.. if you disable the Compressed Textures? I've heard that really takes a bite out of the framerate due to the way they eat memory on the card.
Athlon 1.2 GHz (not O/C, w/retail fan)
ASUS A7V133 (1004 BIOS) w/512 MB CAS 2.5 RAM
ATI AIW Radeon 32MB DDR AGP
SB Live! Dolby Edition 5.1 w/XP Drivers
Windows XP Professional
Via 4in1 4.35 drivers
6025 Beta XP Drivers