I've been able to do this before but for some reason there is currently something wrong. I import a unmodified model, and I try to move the nodes, but itstead moving like it normally does and should, it just stretches the model. :| Any help?

Thats cause it imported a rigged mesh. If you don't care about the rig, and are making a semi-custom vehicle that'll use another vehicle's animations and stuff, for example, just deleet the Skin modifier that's on the model. There's also an option to turn deform off, which allows you to adjust bone positions without deforming the mesh. Not sure if the mesh would snap back to bones after restoring deform, though

I am Fp animating...and it isn't acting normally, and I do beleive I need stuff linked D:

are you making fp for a new character? please elaborate

No. I am using rigged arms and importing a original Halo weapon like I always to to animate it. But when I try to move the nodes (for example, plasma pistol), such as frame cover up, or any nodes that are supposed to move with any weapon, I just stretches the model.

Now I used to be able to do this and it worked fine where I could move the nodes as I pleased.

Ok, import fp nodes as bones, but not fp weapon nodes, thems not bones