Looking on the web, I think you have 4 slots (yellow and black?) so 4 gigs would be 4 x 1 gig RAM. You will need 4 x 2 gig sticks.

I would upgrade the RAM with the old card, it is as good or better than my 8800 GTS 320.

Keyclone and AHK do the same basic things, keep what is working.

Max/Min are WOW graphic settings, Affinty is the CPU setting.

Give that a shot