Hey, please try to work more on your credits. Very rarerly one man creates a custom car by him/her self, make sure you add all the authors. Also "anonymous" is not a valid author unless the creator is actually called that. Except that it's great that you're posting them.

Well, you have to install two things: first, install 'models' folder (which is in 'urban' folder), 'in counter-strike source/cstrike'. Then choose a skin, that might be black, desert, green or urban.

To install your skins:

C:\Program Files\Valve\Steam\SteamApps\david180589\counter-strike source\cstrike

once ur in the cstrike folder open the zip/rar of the download (make sure u have winrar, most of em' r rar files)

inside the zip/rar u will have
-models
-materials
-sound (if it has em)
-scripts (maybe)

notice these files match the files in teh cstrike folder, copy and paste into cstrike and hit yes to all it will put all teh folders where they have to go, alternatively find each directory where the files belong and put them all in yourself - this will show u where everything goes for when u want to get rid of old skins :)

hope that helped.

i dunt know how to either, but TUTS have all the answers to skinning, there one of the options at the top.