I have a Sony Vaio PCV-RS320 I bought late 03, and it's time for a new video card. I just got Half Life 2 and it says my video card is not up to par. It will play, and the graphics are good, but some things will not model untill you are on top of them. What would be a good video card (AGP) for my system (for under $150) ? How do I disable the intergrated video card? Is there a walk through somewhere, I know I can open the case & plug in the card, after that I'm not sure.