Installing
To install the addon, simply download the .zip, extract it into your server's addons folder. Then go into ups/lua/ups/config/sh_config.lua and select your language, if you wish to enable FastDL, and also change the usergroups that can use the in-game config. Remember to add the Content Pack to your server's workshop collection.
Restart your server and enter the game. Type !party and assuming you are the correct rank, you should have a wrench in the top right corner. This allows you to access the in-game config which will allow you to set up the rest of the addon. Simple go through it, close the window, and you're done. Easy :)