Maybe the exploding gateway/teleporter thing will actually teleport her somewhere. Perhaps what Dr. Breen meant when he said it could bring down the Citadel is because the explosion teleports bits of building away.
Yeah, the 9800 XT is not much faster than the 9800 Pro usually and is often pretty much the same.
You can try turning down AA (antialiasing) and AF (anisotropic filtering) in the options to boost framerate. 4x AA is fine.
All the good recent cards are tested on HL2 here...
Yeah, the Garg is the only enemy in a videogame that has ever made me feel fear or panic. Just the way you can turn around and see it at the other end of a corridor coming after you is like something out of a nightmare.
You can actually kill it with conventional weapons but it'll waste a...
The Garg.
If it can get to you, then you're toast. It moves fairly fast and it also takes some real punishment.
For me, the scariest parts of HL1 were when you see the Garg some distance away but you know it's coming to get you...
If by reload you mean reinstall from disc, then there is a very common bug in which you get .cab errors if you don't choose to do a full install that includes Counterstrike: Source.
It doesn't occur to many people to think about saying *spoilers* for a game which is about 5 years old, and I'm one of those people it doesn't occur to. :E
If they haven't played it by now, they're very late indeed.