1. In your Aliens vs Predator 2 directory, create a new folder called Custom.
2. Extract the files from the ZIP folders and find the REZ file.
3. Copy the rez and paste it into your Custom folder.
4. Launch AvP2
5. Click the Options button. Type this into the command line
-rez custom/skinfilename.rez (its not case sensitive)
6. Go play.
*if you have problems, try these steps again. if that doesnt work, contact me*