IIS custom MIME type steps _win server

Click start → programs → administrative tools → IIS Manager. Expand Local computer, Web site, right-click on your site, select Properties, click the HTTP headers tab → Click the MIME type button, click the New button, and then type in the "extension" box. FLV, enter "Flv-application/octet-stream" in the MIME type box, and then OK.
The MIME type is just a description that determines how the file is opened and can be entered at will.
Common MIME Types
Application/vnd.lotus-1-2-3

3GP VIDEO/3GPP
AaB Application/x-authoware-bin
AAM Application/x-authoware-map
AAS Application/x-authoware-seg
Ai Application/postscript
AIF Audio/x-aiff
AIFC Audio/x-aiff
AIFF Audio/x-aiff
ALS Audio/x-alpha5
AMC Application/x-mpeg
Ani Application/octet-stream
ASC Text/plain
ASD Application/astound
ASF VIDEO/X-MS-ASF
ASN Application/astound
ASP Application/x-asap
ASX video/x-ms-asf
Au audio/basic
AVB Application/octet-stream
Avi Video/x-msvideo
AWB AUDIO/AMR-WB
Bcpio Application/x-bcpio
Bin Application/octet-stream
BLD Application/bld
Bld2 Application/bld2
BMP Application/x-ms-bmp
BPK Application/octet-stream
BZ2 APPLICATION/X-BZIP2
Cal Image/x-cals
CCN APPLICATION/X-CNC
CCO Application/x-cocoa
CDF APPLICATION/X-NETCDF
CGI magnus-internal/cgi
Chat Application/x-chat
Class Application/octet-stream
CLP Application/x-msclip
CMX APPLICATION/X-CMX
Co application/x-cult3d-object
Cod image/cis-cod
Cpio Application/x-cpio
CPT Application/mac-compactpro
CRD Application/x-mscardfile
CSH application/x-csh
CSM CHEMICAL/X-CSML
CSML CHEMICAL/X-CSML
CSS Text/css
Cur Application/octet-stream
DCM X-LML/X-EVM
DCR Application/x-director
DCX IMAGE/X-DCX
DHTML text/html
Dir application/x-director
DLL Application/octet-stream
DMG Application/octet-stream
DMS Application/octet-stream
Doc Application/msword
Dot Application/x-dot
DVI Application/x-dvi
DWF DRAWING/X-DWF
DWG Application/x-autocad
DXF Application/x-autocad
DXR Application/x-director
EBK Application/x-expandedbook
EMB Chemical/x-embl-dl-nucleotide
EMBL Chemical/x-embl-dl-nucleotide
EPS Application/postscript
Eri Image/x-eri
Es Audio/echospeech
ESL Audio/echospeech
Etc Application/x-earthtime
ETX Text/x-setext
EVM X-LML/X-EVM
Evy Application/x-envoy
EXE Application/octet-stream
Fh4 Image/x-freehand
Fh5 Image/x-freehand
FHC Image/x-freehand
Fif Image/fif
FM Application/x-maker
FPX IMAGE/X-FPX
FVI Video/isivideo
Gau Chemical/x-gaussian-input
GCA application/x-gca-compressed
GDB X-lml/x-gdb
GIF image/gif
GPS Application/x-gps
Gtar Application/x-gtar
GZ Application/x-gzip
HDF APPLICATION/X-HDF
HDM TEXT/X-HDML
HDML TEXT/X-HDML
HLP Application/winhlp
HQX application/mac-binhex40
HTM text/html
HTML text/html
HTS text/html
Ice X-conference/x-cooltalk
ICO Application/octet-stream
Ief Image/ief
IFM Image/gif
IFS Image/ifs
Imy Audio/melody
INS Application/x-net-install
IPs Application/x-ipscript
IPX Application/x-ipix
It Audio/x-mod
Itz Audio/x-mod
IVR I-WORLD/I-VRML
J2K image/j2k
Jad Text/vnd.sun.j2me.app-descriptor
Jam Application/x-jam
Jar Application/java-archive
JNLP Application/x-java-jnlp-file
JPE Image/jpeg
JPEG Image/jpeg
JPG Image/jpeg
Jpz Image/jpeg
JS Application/x-javascript
JWC APPLICATION/JWC
KJX APPLICATION/X-KJX
Lak X-lml/x-lak
Latex Application/x-latex
LCC Application/fastman
LCL Application/x-digitalloca
LCR Application/x-digitalloca
Lgh Application/lgh
LHA Application/octet-stream
LML X-lml/x-lml
Lmlpack X-lml/x-lmlpack
LSF video/x-ms-asf
LSX video/x-ms-asf
LZH Application/x-lzh
M13 Application/x-msmediaview
M14 Application/x-msmediaview
M15 Audio/x-mod
M3U Audio/x-mpegurl
M3url Audio/x-mpegurl
MA1 AUDIO/MA1
Ma2 Audio/ma2
MA3 AUDIO/MA3
MA5 AUDIO/MA5
Mans Application/x-troff-man
Map Magnus-internal/imagemap
MBD Application/mbedlet
MCT Application/x-mascot
MDB application/x-msaccess
Mdz Audio/x-mod
Me Application/x-troff-me
Mel Text/x-vmel
Mi application/x-mif
Mid Audio/midi
MIDI Audio/midi
MIF APPLICATION/X-MIF
Mil Image/x-cals
Mio Audio/x-mio
MMF application/x-skt-lbs
MNG video/x-mng
Mny Application/x-msmoney
MoC Application/x-mocha
Mocha Application/x-mocha
MoD Audio/x-mod
MOF Application/x-yumekara
MOL Chemical/x-mdl-molfile
Mop Chemical/x-mopac-input
MOV video/quicktime
Movie Video/x-sgi-movie
MP2 Audio/x-mpeg
MP3 Audio/x-mpeg
MP4 Video/mp4
MPC Application/vnd.mpohun.certificate
MPE Video/mpeg
MPEG Video/mpeg
MPG video/mpeg
MPG4 Video/mp4
MPGA Audio/mpeg
MPN application/vnd.mophun.application
MPP Application/vnd.ms-project
MPs Application/x-mapserver
MRL TEXT/X-MRML
MRM APPLICATION/X-MRM
Ms Application/x-troff-ms
MTS Application/metastream
MTX Application/metastream
MTZ Application/metastream
Mzv Application/metastream
NAR Application/zip
Nbmp image/nbmp
NC application/x-netcdf
NDB x-lml/x-ndb
Ndwn Application/ndwn
NIF application/x-nif
Nmz Application/x-scream
Nokia-op-logo Image/vnd.nok-oplogo-color
NPX APPLICATION/X-NETFPX
Nsnd audio/nsnd
NVA APPLICATION/X-NEVA1
ODA Application/oda
Oom Application/x-atlasmate-plugin
PAC Audio/x-pac
PAE Audio/x-epac
Pan Application/x-pan
PBM Image/x-portable-bitmap
PCX image/x-pcx
PDA IMAGE/X-PDA
PDB chemical/x-pdb
PDF Application/pdf
PFR APPLICATION/FONT-TDPFR
PGM Image/x-portable-graymap
PICT image/x-pict
PM Application/x-perl
PMD APPLICATION/X-PMD
PNG image/png
PNM Image/x-portable-anymap
PNZ Image/png
Pot Application/vnd.ms-powerpoint
PPM Image/x-portable-pixmap
PPS Application/vnd.ms-powerpoint
PPT Application/vnd.ms-powerpoint
PQF Application/x-cprplayer
PQI Application/cprplayer
PRC APPLICATION/X-PRC
Proxy Application/x-ns-proxy-autoconfig
PS Application/postscript
Ptlk Application/listenup
Pub Application/x-mspublisher
PVX VIDEO/X-PV-PVX
QCP Audio/vnd.qcelp
QT Video/quicktime
Qti Image/x-quicktime
Qtif Image/x-quicktime
R3T Text/vnd.rn-realtext3d
RA Audio/x-pn-realaudio
Ram Audio/x-pn-realaudio
RAR application/x-rar-compressed
RAS Image/x-cmu-raster
RDF Application/rdf+xml
RF Image/vnd.rn-realflash
RGB Image/x-rgb
Rlf Application/x-richlink
RM Audio/x-pn-realaudio
RMF AUDIO/X-RMF
RMM Audio/x-pn-realaudio
RMVB Audio/x-pn-realaudio
RNX Application/vnd.rn-realplayer
Roff Application/x-troff
RP Image/vnd.rn-realpix
RPM Audio/x-pn-realaudio-plugin
RT Text/vnd.rn-realtext
RTE X-lml/x-gps
RTF Application/rtf
RTG Application/metastream
RTX Text/richtext
RV Video/vnd.rn-realvideo
RWC Application/x-rogerwilco
S3m Audio/x-mod
s3z Audio/x-mod
SCA Application/x-supercard
SCD Application/x-msschedule
SDF Application/e-score
Sea Application/x-stuffit
SGM TEXT/X-SGML
SGML TEXT/X-SGML
SH application/x-sh
Shar Application/x-shar
sHTML magnus-internal/parsed-html
SHW application/presentations
Si6 Image/si6
Si7 image/vnd.stiwap.sis
Si9 image/vnd.lgtwap.sis
SIS Application/vnd.symbian.install
Sit application/x-stuffit
SKD Application/x-koan
SKM Application/x-koan
SKP Application/x-koan
Skt Application/x-koan
SLC Application/x-salsa
SMD AUDIO/X-SMD
SMI Application/smil
SMIL Application/smil
SMP Application/studiom
SMZ AUDIO/X-SMD
SND Audio/basic
SPC Text/x-speech
SPL Application/futuresplash
SPR Application/x-sprite
Sprite Application/x-sprite
SPT APPLICATION/X-SPT
SRC Application/x-wais-source
STK Application/hyperstudio
STM Audio/x-mod
Sv4cpio Application/x-sv4cpio
SV4CRC APPLICATION/X-SV4CRC
SVF IMAGE/VND
SVG image/svg-xml
SVH IMAGE/SVH
SVR X-world/x-svr
SWF Application/x-shockwave-flash
SWFL Application/x-shockwave-flash
T Application/x-troff
Tad Application/octet-stream
Talk Text/x-speech
Tar Application/x-tar
Taz Application/x-tar
TBP application/x-timbuktu
TBT Application/x-timbuktu
Tcl APPLICATION/X-TCL
Tex Application/x-tex
Texi Application/x-texinfo
Texinfo Application/x-texinfo
Tgz Application/x-tar
tHM Application/vnd.eri.thm
TIF Image/tiff
TIFF Image/tiff
Tki application/x-tkined
tkined application/x-tkined
TOC Application/toc
Toy Image/toy
TR Application/x-troff
TRK X-lml/x-gps
TRM Application/x-msterminal
TSI Audio/tsplayer
TSP application/dsptype
TSV Text/tab-separated-values
TSV Text/tab-separated-values
TTF Application/octet-stream
Ttz Application/t-time
TXT Text/plain
Ult Audio/x-mod
Ustar Application/x-ustar
UU Application/x-uuencode
Uue Application/x-uuencode
VCD Application/x-cdlink
VCF Text/x-vcard
VDO VIDEO/VDO
Vib Audio/vib
Viv Video/vivo
Vivo Video/vivo
VMD Application/vocaltec-media-desc
VMF Application/vocaltec-media-file
VMI Application/x-dreamcast-vms-info
VMS Application/x-dreamcast-vms
Vox Audio/voxware
VQE Audio/x-twinvq-plugin
VQF AUDIO/X-TWINVQ
VQL AUDIO/X-TWINVQ
VRE X-world/x-vream
VRML X-WORLD/X-VRML
VRT X-WORLD/X-VRT
VRW X-world/x-vream
VTS Workbook/formulaone
WAV Audio/x-wav
Wax Audio/x-ms-wax
Wbmp image/vnd.wap.wbmp
Web Application/vnd.xara
WI image/wavelet
WIS Application/x-installshield
WM VIDEO/X-MS-WM
WMA audio/x-ms-wma
WMD APPLICATION/X-MS-WMD
WMF Application/x-msmetafile
WML TEXT/VND.WAP.WML
WMLC APPLICATION/VND.WAP.WMLC
WMLS Text/vnd.wap.wmlscript
WMLSC APPLICATION/VND.WAP.WMLSCRIPTC
WMLScript Text/vnd.wap.wmlscript
WMV audio/x-ms-wmv
WMX VIDEO/X-MS-WMX
WMZ APPLICATION/X-MS-WMZ
Wpng Image/x-up-wpng
WPT X-lml/x-gps
WRI Application/x-mswrite
WRL X-WORLD/X-VRML
Wrz X-WORLD/X-VRML
WS Text/vnd.wap.wmlscript
WSC APPLICATION/VND.WAP.WMLSCRIPTC
WV Video/wavelet
WVX VIDEO/X-MS-WVX
WXL APPLICATION/X-WXL
X-gzip Application/x-gzip
Xar Application/vnd.xara
XBM Image/x-xbitmap
XDm APPLICATION/X-XDMA
XDMA APPLICATION/X-XDMA
XDW Application/vnd.fujixerox.docuworks
Xht Application/xhtml+xml
Xhtm Application/xhtml+xml
XHTML Application/xhtml+xml
XLA application/vnd.ms-excel
XLC Application/vnd.ms-excel
XLL Application/x-excel
XLM application/vnd.ms-excel
XLS application/vnd.ms-excel
XLT Application/vnd.ms-excel
XLW Application/vnd.ms-excel
XM Audio/x-mod
XML Text/xml
Xmz Audio/x-mod
XPI Application/x-xpinstall
XPM Image/x-xpixmap
Xsit Text/xml
XSL Text/xml
XUL Text/xul
XWD Image/x-xwindowdump
XYZ chemical/x-pdb
YZ1 APPLICATION/X-YZ1
Z application/x-compress
Zac Application/x-zaurus-zac
Zip Application/zip