Same here with one of those CDs full of shareware in early 90s. Autorun.bat running an interface.exe when the disk was inserted into the family computer's drive. Navigating the flash interface, I found the adult section and instuctions to decrypt the pictures by calling a surcharged phone number. I browsed the CD and found the corresponding /folder full of lady01.ass or lady02.tits, can't remember the extension. Tried to rename files to .jpg. And it Worked.

I then made my very own .bat with "ren .tits .jpg" into that folder and had a great afternoon.