anyone know how to access and adjust GPU settings?? Maybe this will help me with my choppy expose (only on battery power) issues. I am new to macs - just upgraded from macbook CD 2.0GHz to MBP C2D 2.13GHz.....funny thing, my macbok seemed much quicker, never had any choppy gpu issues. I mess with the graphics preferences quite often on my pc - for gaming, but have et to figure out how to do it on this MBP. THanks