Blender and GMod: Using your own rig for a custom player model?

So I managed to get my hands on a model of Ratchet from Ratchet and Clank Into The Nexus, and I wanna use it as my player model in GMod. I decided to take a short cut and use the auto-rig addon that comes with blender now and I just edited it from there (considering the model is in T Form and it’s propotions are wonky do to the cartoony style). From what I understand the bones have to have valve. in the name (i.e: valve.uparm.L) in order for GMod (and the Valve Engine itself) to recognize them. Is it possible to rig the model for GMod using the “valve.bonename.side” layout, and somehow copy the already existing player animations in game and apply them to the rig? Or is there a better way? I’ve also attatched the model I’m attempting to rig if needed to provide assistance. ItNRoboRatchet.zip (993 KB)

This link here has proved helpful. I still have my own questions about it, but I’m sure you can make more of it than I can.
https://steamcommunity.com/sharedfiles/filedetails/?id=702924242