I'm not a computer wiz, but I'm just wondering if add more RAM would speed up gameplay? I know it'll speed up the computer itself.

I have 512mb right now. (max of 4GB) And will be replacing it with 2 sticks of 2Gb's and putting the 512mb elsewhere.
I'm running windows XP pro, Nvidia Gforce 6200 (sucks I know) and 2.7 GHz 4CPU.