Installing Custom Tile Skins

Hello all

So I'm a newb.  I am trying to play around with the tiles feature but can't figure out for the life of me how to install a custom tile skin.

This is what I'm doing:

Download .zip file off winCustomize page.

Open up the "Stardock Tiles Configuration", click on "Style", then, then click "browse".

At this point it only lets me select individual images files (.png, .bmp, etc).  This obviously isn't right be cause it applies only that picture file rather than the entire set of images that make up the tile skin.

I know there is something stupid I'm missing so someone who's expert please slap me in the face and tell me what I'm doing wrong, thanks!!