Garry's Mod 10 | Integrate Left 4 Dead 2 Infected and weapons

[Slush Puppy]

Hi there ...

I got myself the Orange Box, Counter-Strike : Source + Left 4 Dead 1 & 2.
After playing around with those games, I stumbled upon Garry's Mod 10 and had the idea of spawning the infected from Left 4 Dead 2 around random CS maps. That would be fun.
But I'm new to the things and I'd like a little help.

Can you please tell me how to:

- Include the common infected (maybe the special infected, too) to Garry's Mod 10? (As hostile NPC. They should act like they do in the original game.)
- Include the weapons from Left 4 Dead 2 to Garry's Mod 10.
- Include the survivors from Left 4 Dead 2 to Garry's Mod 10. (I saw that they're already in therem but they're just ragdolls and no "real" NPCs who walk around and shoot things.

Thanks in advance. I really appreciate your effort.

P.S.: I'm totally new to these things so please - when you explain, don't imply that I know how to do "'dis & dat" which should be the basics. Sorry.

:)