Installing...

some themes come in pre-set folder structures so all you have to do is drop it in the forum root and you're done. some themes you have to place each file and folder in it's respective places. ie(typically): in the style folder goes the style.css and in the "imports" folder goes the style_cs.css file. now if there are images they usually go in the "img" folder in another folder with the same name as the style.

hope this helped.