PAYING - Trouble in Terrorist Town Shop

I am hoping to have a shop for my TTT server which allows you to buy Traitor or Detective as well as an arrangement of weapons. The currency would be credits that you get from killing a Traitor as Innocent/Detective and receiving 1 points a kill and Traitors getting 1 point with every 2 Innocent/Detective kills. You would also get one credit for simply playing a round, and one for your team winning.
I would like if you could open up the menu by simply clicking F4.
The images showing showed next to an item on the list are the same as the ones you see when you ID a body and it has things such as he was killed by a M16 and he was a Traitor.

This would be a great help, if you are intrested either PM me or simply post here.

Thanks!