Different interfaces for different alts help needed

[Deejay]

Right, I'm going to get straight into this,
Whilst I'm playing on my DK I want to have Towelliee's tank interface as I tank on my DK... but then on my Priest I want to have Shadowmage's UI for healing, but the thing is, I don't know how to set up my addon/wtf folders so that the game recognises that I want the seperate interfaces for the different alts and I was wondering if it was possible? Like I know that you can enable/disable certain addons for different alts but I want to be able to merge the different profiles for the addons and then be able to switch between them all with a click of a button or something

Thanks.