I just bought a black-book for my daughter. She proceeded to install Guitar Hero 3 for mac. Found out that the installed video card,Intel GMA X3100, is not compatible or powerful enough to run this game. The company suggested the NVIDIA GeForce 7300, 7600, 8600, the NVIDIA Quadro FX 4500, and the ATI Radeon X1600, X1900, HD 2400, HD 2600. I am looking for something under $100 that will run this game. Anyone have any experience with any of these cards? Is it easy to self install one of these for the macbook? Any suggestions and or instructions would be most helpful. Thanks!