Yes dx 9 is fine with gp4 if u load the game up by the exe file in the gamedirectory (or a shortcut from it) and not the launcher - as the launcher does not like it.
Band of the week: Muse
Game of the week: Call of Duty
Beardless2AMD XP 2700+ | Asus A7N8X nForce 2 Deluxe | 1 GB PC2700 RAM DC | ATI RADEON 9800 | WD 120GB 8MB | NEC 16x DVD | Lite-on 48x24x48 | XP