JIT settings are giving me fits too, actually. So far, I haven't found any combination that works.
da log
That's a link to my winuaelog.txt. Too big for forum posting, IMHO.
As for my PC:
AMD Athlon XP 2000+ (normal clocked)
512MB DDR RAM
GeForce 4
Windoes 2000 w/sp2 and all the swiss cheese plugs (aka patches)
AIAB r10c using AIAB_WB config (for the error log above)
--- no config I've tried works if JIT is enabled
latest drives, latest Direct X, yadda yadda yadda