1.
2. This is possible, but you have to go into either the maya or xsi tool source plugin and actually change them yourself, but you have to know what you're doing. Might be a mod somewhere out there for this. Google it. And its a .357.
3. No clue.
What you used in half life 1 was the mach 4 HEV suit, so there were earlier versions of it. Gina Cross didint make it, she was just the "model" for it in the hazard course.
You have a horrible processor, which is whats causing the lag. If you set everything to low, you'll be able to run it. I really have a hard time believing that you can run tf2 smoothly on a Pentium, single core processor.
Other then minerva and sweet half life (a really old mod for hl1), the best mod that I've ever played. Besides the glitchy train part, I can honestly not think of anything wrong.
Overwatch sctor, how on earth was this half assed?
I wouldn't say that he's always smiling, take the beginning of episode 1, where he is definitely not smiling, or when he gets his brains sucked out. No smiling.
On a side note, did you know that valve got the a local homeless dude to be the face model for eli?
Try verifying the integrity of the game cache, which solves like 90% of loading problems. If that doesn't work, try tweaking with the graphics processing things in the graphics options.