How to make Dreamweaver support kid extensions

  After a lot of searching and groping, finally succeeded. Summarized as follows:
1, then Dreamweaver can identify *.kid file, and as HTML page processing, need to modify two files,  
(1) Extensions.txt------located in your user directory, such as C:d Ocuments and Settingsadministratorapplication datamacromediadreamweaver 8 
(2) The Mmdocumenttypes.xml----is located in the program installation directory, such as D:toolsdreamweaver 8configurationdocumenttypes ,
2, with the editor to open the Extens.txt, Replace XHTML with Xhtm,kid using the Replace feature. There should be only two replacements, one in all documents, and the second in the other: HTML documents. Note that the document type should be capitalized, such as kid, rather than kid. Save Exit &NBSP
3, open mmdocumenttypes.xml with editor, find the section below and add Kid, as follows:  
<documenttype id= "HTML" internaltype= "HTML" winfileextension= "Html,htm,shtml,shtm,stm,tpl,lasso,xhtml,kid" macfileextension= "Html,htm,shtml,shtm,tpl, Lasso,xhtml,ssi,kid "file=" "L" writebyteordermark= "false" >&NBSP;
Save exit. Winfileextension refers to extensions in the Windows system, Macfileextension is an extension   in Mac OS systems;
Note that under the same directory and user directory, you cannot have files of the same name, including backup files, Otherwise, there will be "HTML already associated ..." at startup. "and other warning messages. &NBSP
That's what I'm not noticing. This warning message is determined many times each time the DW is started, and then the backup file with the same name is deleted, and the warning message is no longer prompted. &NBSP
4, if you want to make DW the default editor for *.kid, you can associate the *.kid file with the DW default by opening the Resource Manager-> tool->Folder Options-> file type, find *.kid extension, if not a new one, then "change", find DW, the two connected,  
After this setting, the DW can recognize *.kid files and treat them as L.