To install the files in the game, follow these steps:
1. Make a backup of your models folder located in (windows) "C:\program files\Sauerbraten\packages\models"
(recommended but not necessary)
2. Extract the folder from my .zip archive to the model folder.
3. Open up Sauerbraten and load a map.
4. Type the command /hudgunsdir "my_weapons" <--- since that is the name of my folder, if you renamed it, type your name here instead.
...and there you go, if you did everything right you are now supposed to be able to see my weapons. To change back to the standard weapons, type /hudgunsdir "".