yeah its not a mod:

"However, Rockstar Games' argument has been undermined by an increasing number of reports that claimed the sex minigame is in the PlayStation 2 version of San Andreas. Since the PS2 version comes on an unmoddable DVD, it cannot have any content added to it, although cheat codes--created either by the publisher or third parties--can unlock preexisting code on the disc. While devices such as GameShark and Action Replay Max can tweak preexisting variables in system memory with cheats, they cannot inject new models, animations, and/or code into a game."

http://www.gamespot.com/news/2005/07...s_6129301.html