With the "Virtual CD-ROM drive" with Windows subst command _ Application Tips

Do you know that there is a relatively safe and efficient virtual optical drive software in every day of dealing with Windows? Then he is a pure DOS command subst, its usage is: Subst Letter: path (to virtual path) For example: Subst h:e:\english.
After such a setting, then H disk corresponds to the e:\english under the file. However, every time you start your computer, all of the "virtual optical drives" will disappear without a trace. This is what you can edit Autoexec.bat file to solve. (under the Win98).
But in Win2000 and XP a little bit of trouble, in addition to executing the above command to enter the registry, to navigate to the Hkey_local_machine\software\windows\currentversion\run key value, a new word channeling value. Name any, the key value is "C:\autoexec.bat" and then log off or restart the computer.
Finally, note that the subst command is only valid for folders, which means that the virtual CD-ROM files in ISO, FCD, and so on are not processed in a single file, and are not valid for some compact discs.
And finally tell everyone to delete his method is: subst your virtual letter:/d can be.