Rank Prefixes in Prophunt

[Ravenholm!]

I'm clueless when it comes to lua, but I got a friend to make this quick script for me to allow different ranks such as superadmin or admin to have prefixes next to their name in chat. Ex: [Admin] Ravenholm: test

[url]http://pastebin.com/hyfa1Q1M#[/url]
I am just not sure what to do from here, I put it in lua/autorun
He said I needed to add groups to it but I have no idea what anything means or where to edit or add
I need:
[Owner]
[Superadmin]
[User]

I'm using Ulx Admin so it is set up for that.

[editline]29th October 2013[/editline]

Problem solved /closed