Hey, would it be possible for someone to make an IK rig for these Imperial Guard models that were released by wraithcat on Facepunch?

http://www.garrysmod.org/downloads/?a=view&id=132068
http://www.garrysmod.org/downloads/?a=view&id=132273

I need them for a video I am working on, and I really don't feel like working in FK for the entire time. :P

Also, if you could tell me how you did it, that would be great. I don't want to start a new discussion here every time I need a new IK rig, so I would like to learn how to do it myself. I tried making IKs for these models many times before, and it failed every time. Whoever attempts this I wish you luck, and thanks in advance.