Stalker mouse problem
Just for future reference: Checking the Crossover Games forums for your game problems will probably nail you more success than asking here.
The problem with Stalker using Crossover is that the mouse is "in love" with the bottom of the screen, and doesn't want to leave it's side. The only way to fix this, is to put it into windowed mode, and only using the option in the in-game settings will fix it. All you have to do is fling your mouse upwards, so the mouse reaches the top of the screen, and when it's on it's way down, try and hit the settings button, then again with the windowed mode option, and again with "Apply". It will take a while, but sooner or later you will get it.