*EDITED IN* Guide came from D3scene.com this is not all my guide but it has been edited.
This is one of the simplest ways to answer a ticket in any WoW private server.
First Download Ticket Tracker
Then unzip it to C:\Program Files\World of Warcraft\Interface\addons
Next open WoW.
Now that you have it installed and ready to go you need to do the following...
Its outdated so in order for it to work open your addons menu from the character list.
Now click load outdated addons
There now enter WoW
type /tt to open the addon on your character and start answering tickets.