I just recently purchased mercenaries 2, and installed windows vista ultimate edition on my Macbook Pro, its 2.4GHZ, 4 Gigs of RAM and has a 256MB Graphics card (Nvidia GeForce 8600GT). I installed the game succesfully, and was able to run the game perfectly up until the first boat ride. I was able to sit still and watch the environment and waves crashing, but every single time I started to drive anywhere, the game would crash. I returned the disk, and they replaced it, SAME PROBLEM. Can anyone tell me if this is a graphics/sound driver problem? and if so, how can I correct it?