You need to upload each single iteam to a website such as photobucket, imageshack et cetera.
Than you just copy the link code and post it.
Or you use rapidshare as the previous poster has mentioned. :V
If you want to preview the set convert the images to .tga and put them into your custom folder (look into other folders to see how they must be named). Than you open toribash and take a screenshot with F8 and post it on the forums.