You need to open up the NotePad.exe program to create the AutoRun.inf file. Once you have opened up NotePad, type this into the file...
[autorun]
open = YourPowerpointFile.pps
Close NotePad and save the file with the file name: AutoRun.inf
Burn the AutoRun.inf file and your powerpoint file to the CD. If the users AutoRun feature is turned on, the slide show should automatically start after the CD is inserted. Also, the users PC must have the MS Powerpoint program installed.
HTH