How would I turn an NPC on the workshop into a player model?

[Bitmicro]

I've been wanting to make these 2 NPC's that I found on the workshop into player models (I asked the owners for permission and they were absolutely fine with it)

[url]http://steamcommunity.com/sharedfiles/filedetails/?id=162232002[/url]

[url]http://steamcommunity.com/sharedfiles/filedetails/?id=161554128[/url]

Thanks in advance