i have a 1.8 single G5, Tiger 10.4, 2GB RAM, ATI Radeon 9800 (256MB) graphics card. installed UT2004 (installer in dvd has the date March 7, 2004, i bought the game on august 2005) and applied 3355 patch. game sometimes hangs on start (dark screen, nothing happens) but systematically hangs on...