HELP ME

hey guys ive done this as a blog to get the best help, as more people will more then likely see it. now ive deleted 2 folders my "old nolanverse" and my "old burtonverse" how to get these back ???? as u can see ive put some old micros on my featured page but that was only while i moved everything around. But i did delete those 2 folders how do i find them??

also i wanted to changed the main pic on my folders like for example if i had a Batman movie folder how do i get a image of i dont know the tdk logo or 89 logo. again please help me.