What are the items I can use to create nice skin, i mean to use the backdrops that dont have the body shape in the middle?? I dont know if im clear on this..

You want items that will change your skin like and or to simply have it over backdrops? If it's the latter you don't need an item, simply drag the backdrop (or any item you wish to stay behind the base) to under the 'base' box, just like you would do to layer items.

Thanks