bluetrumpet2012

hey im josh, i had a few questions. im thinking of upgrading some components, here is my system info- Windows vista home premium service pack 2 Model- a6157c intel core 2 cpu 4400 @2.00GHz 32 bit operating system 2gig ram now i want to put a 2 more sticks of ram to make it 4gigs total( 4 is max..) not sure what ones i can get.. and i also am looking to get a graphics card for gaming ( world of warcraft to be exact) if someone could help me out that would be very much appreciated=)