OldUnreal (Engine)

If an IP Address has multiple servers is there a way to join one specific server to enter with a custom skin? For example, Open IP?class=snakebite.snakebiteskin1. If that doesn't work can somebody please give me an example of how to make it show up on the playersetup list unless there is another way. Thanks

open ip:port?stuff=stuff,blah=blah etc.

Also, you're demonstrating a custom class and not a custom skin, but what I said above will work regardless.