I don't know what you're trying to do, but I know that some Win2k discs don't come with autorun on them, as well as some discs from other software vendors.
If you are trying to create an autorun, then just create an autorun.ini file with the following data:
[autorun]
open = whatever.exe
;use the following line if you want to display an icon for your CD
ICON = icon.ico
Hope this helps...