I've tried playing this on my MacBook Pro under Vista (Radeon Mobile X1600) and have been unable to get past the incredibly broken skybox textures--clearly there's some weirdness going on, as I've recognized strangely transformed versions of icons overlaid on the skybox, giant magenta swathes (as in pure #FF0), strangely chopped up textures, all sorts of distracting annoyances. Is there anything I can do to help get this fixed? I can provide screenshots if needed.

Drivers are all up-to-date.