Not really, there isn't any realistic way of shifting load from GPU to CPU. The two just aren't designed to perform the same kind of math.
Honestly, if you're college student strapped for cash but want a great gaming experience at your monitor's resolution, go with the
Radeon HD 7770. A very powerful card for just $100, will allow you to run most modern games at high-ish settings (including PS2). The only thing to check here is to make sure your power supply has a six-pin PCI power connector (it has black and yellow wires). If it doesn't, you'll need to step down to a 7750 - slightly less powerful, but doesn't require the extra power connection.