Forcing a pointshop2 playermodel

Hello,

I have pointshop 2 and my players can go to a private game and choose a playermodel and come back to my server with a playermodel that I put in pointshop2. I'm looking for a script to force the player to have a default skin when he appears on the server and after he dies? And when he changes his playermodel via pointshop2 it doesn't block his playermodel in pointshop2 from the script.