Third person model in SP?

Black Mesa Archive The Cafeteria
#1

I found a Gordon Freeman MP playermodel on the workshop and I was wondering is there a way to port the model and animations to replace the crappy placeholder in SP?

https://steamcommunity.com/sharedfiles/filedetails/?id=462306776&searchtext=Gordon+Freeman

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.