also, i keep on getting error messages such as 'script error, engine shut down' even when trying to run techdemo.wmp i haven't done anything to it, it says lik weapon.wdl 185:3 error(218): Sound/Music disruptor_zap zap.WAV not found <camera_solidpass=1> TECHDEMO.WDL 105:0 error(63) Parameter unknown camera_solidpass .....