I have no idea how to rig, I want to get my Reach PR some animations or at least FP hands. I'm trying to get the original PR's animations and FP into Gmax so I can replace the PR with mine, but the FP only shows a gun, no hands, and the animations are model_animation files, of which I can't find any importers on google.
Anyone wanna tell me what I should be doing?

Shadowslayer knows all about rigging. Ask him.

Search setting up fp animation tutorial or something like that. There is one.

This is not Source, the gun and hands are not one in the same. That means you have to import them separately [if you want to animate newly]. If you just want the regular Halo 1 PR animations then you'll have to import your model and then the Halo 1 PR model, then rig yours according to how the H1 gun is.

In terms of rigging, you'll have to look around in terms of how to do it all. It's not incredibly hard, just a bit tedious as you have to separate the parts of the gun you want to move from the main portion of the gun.

Thanks, I'll check some of those.

is this something you needed?
http://ghost.halomaps.org/bluestreak/animation/