PCG99;
Your problem is almost certainly 'compatability settings'.......go to the taow folder and right-click on your oparts '.exe' (once for each version, eh?).
This should bring up a new window, on which you should find several 'tabs', one of which is 'compatability'..........click it!!!
Set compatability to 'Windows 2000', and life should be good.
If you still have problems, reload, and ensure your patched to the CORRECT VERSION for your particular toaw game.
Mods: sorry, eh? Just got here, did I miss the 'mechanics workshop' ? repost,plz.......