Hi, i'm about to pick up a used PB 15" 1.33 GHz. It has 768 ram, but I plan on upping that to 1.5GB. How will games like Call of Duty or Halo run? How will Warcraft III and other RTS games run? I realize I won't be playing doom 3 on this machine, but just wanted to get some opinions. Also, on another note, where is a good place to buy these games? Are there any places that sell older games (such as warcraft 3) at a lower price since they are older? Thanks!