Rigging, Animating & Exporting from 3ds max to HL2

[SOCOM-DELTA]

Just like the thread title says. Anyone know where I can find some tutorials on this? I'm working on a submachinegun model at the moment and I don't know how exactly I should go about setting up my rig, or whether the different pieces I have (folding stock, bolt, removable magazine, and gun itself) should be all in one model or separate objects in the same scene.

I can clarify, with pictures, if need be.

Thanks!