Been working on this for about two hours, my first theme so its nothing spectacular. but i changed backgrounds, most of the icons (probally need to resize a few of them to smoothen them out).
unzip the theme. go into BBDM go to application loader.... and it should be self explanitory from there.. im not at home.. so i dont know what exactly it says but you want to be in the application loader then then find the path. hope that nonsensical rambling helped