Did you try pressing enter on the option screen to enable the subpanel? The UI is a straight lift from consoles so clicking on it without pressing enter does nothing.
actually juz clicking on the sub menu will do... but yea i tink ur reply is closer to the mark regarding his problem... Didn't tink of it... stupid me
As far as i understand from the Saboteur boards. That isn't the trainer causing the issue. I am suspecting you have an ATI gfx card? Alot of people with ATI cards seem to have GFX glitches and issues in general with the game.
I do not think the trainer itself should be causing any issues like those you mention.