Radio Button style input

I am working on a composition that allows users to play different movie files back I am trying to make it as easy as possible to use. I would like the user to simply press number 1,2,3,4 or 5 on a keyboard. I am trying to work out a way to radio button the in out so you only get the output from one key press at a time. I have looked at loads of different options but I can't seem to get one to work, I feel I should be able to build one out of logic patches but I haven't fount the right combination. Any help as ever is greatly appreciated. Cheers Steve