I've got a pretty similar setup to yours (2.4 GHz Q6600, 1GB ATi 4890, 4GB RAM) and I used to get this glitch sometimes when I start up the game but it would go away if I restarted the game or changed/lowered the display resolution. Since yours is the Steam version, I assume you've got all the...
Didn't they send you the random password in an email? Unless you've deleted it, in which case, you'll have to rely on Steam Support to reset it again, I guess.
Don't know how credible this is but MovieStinger says no.
I was already in awe of the soundtrack from the movie so this is just icing on top. http://www.youtube.com/watch?v=UVkQ0C4qDvM
Help Wanted & Offered is more about Source mod projects. This should really be in the Hardware and Software subforum, which gets more attention from our more technically inclined regulars. So... voila!