IF u guys seen my post in the gamers section, i have already sold my iBOOK and got myself a powerbook i would like to game warcraft 3 TFT and sim city 4 on my PB as well right now it only has 256 ram im deciding if i should get another stick of 512 or just aim for the 1 gig? if 1 gig, what brand? any good place to pick it up from? any website to show me how to install it on my own? would i see a big difference in performance? or just mini ? i forget the rule of ...? disappearing or something...something i learned in economics class.... thanks!