css weapon reskins

[Kaiser Wilhelm I ?DetroitRP]

I dont like when I play OCRP and see these ugly weapons. I have seen people on PERP who have done videos and have had a reskinned ak while playing. I want to get a reskin for the police UMP45, the police pistol, and the police shotgun. Someone told me I could simply use the regular css reskins. I want to this one for when I play gmod specificlly, this one is for the police UMP45 http://www.gamebanana.com/skins/30478 I just want the reskin, not the animations. Same for the m3 http://www.gamebanana.com/skins/screens/20913?screen=0 how do I do so correctly?