I bought the G4.5, down loaded all the add ons thinking that they were the expasion packs free! They are not I was fooled. They are nothing more than the old Addons from G2 that Ialrady had except they have been reworked to work on G4.5. In fact I don't see any improvement in the video quality, its delayed recation, and a little jerky. I have 4 gigs of ram and a good video card . A new computor! I see demo and looks like super graphics but not when I bought it. Maybe only the Expansion packs look better and not the add ons?