http://www.wowwiki.com/EPGP
Here are the following links you need for the EPGP Loot system we are going to use.
The first one is not required, but lets you see everyones Priority at a glancehttp://wow.curse.com/downloads/wow-addons/details/epgp-dkp-reloaded.aspx
This second one, lets us roll on the loot faster when raiding, This one IS REQUIRED:http://wow.curse.com/downloads/wow-addons/details/epgploot2.aspx
Here is a great explanation of a guild that uses it, I based ours off of theres:http://www.aphorism-guild.org/2007/03/loot-system.html
And here is its documentation:http://www.epgpweb.com/help/index