Can someone rig a current model to work for a NPC model?

[Jimmy422]

There's a skeleton model, models/skeleton/skeleton_whole_noskins.mdl (I think it's from Episode 2), that i'd like to use for NPCs. However I don't think it has the right bone names or whatever, as when you use the model manipulator in GMod it doesn't work to replace any NPC's model. Can someone rig it to work with NPCs (Specifically the combine and zombies)?