Well, from just a cursory glance at the thread you linked me to, it seems that a bunch of people are having problems with this. Among other things:
Warning: Failed to load 'Material Shadow.skin01_0': Failed to find object 'Material Shadow.skin01_0'
ScriptLog: TeamSkin not found None
That's no good. Also, it seems that it's just an updated model from UT2k3. If you are getting a GPF, try cleaning out your cache and reinstalling the model. I never crashed.