Okay, apparently, trawling through more threads reveals that it may be Nero that is causing havoc. I have no problem playing Vanilla RTW, but this mod incurs the wrath of Nero, somehow. *Sigh* I don't really want to be going about uninstalling software on a computer that's technically not mine (still waiting on my own to ship out to me), but this is LAME. Damn Nero (if it turns out to be what is causing the problem)