ppt autorun from usb memory stick

[Victor and TJ Friedmann]

I have an autostarting ppt presentation with pptviewer on CD. I copied all
the files including the autorun.inf which has in it:

[autorun]
open=PPTVIEW.EXE /L "playlist.txt"

And, although the CD autoplays just fine on my WinXP machines, the memory
stick will not autoplay on WinXP but does autoplay on Vista.

How can I modify the autorun.inf file to run from my memory stick?

Thanks,

Vic