My mom has taken a couple of my strapless prom dresses and added short sleeve to them, I have no idea how in detail to explain it to you but basicaly she got matertial that fit with the dress and at Joanns she had found a pattern in the wedding dress section of the books and we just picked out a sleeve from that and she followed the pattern. From me with no experience the only thing I saw that was a huge pain was trying to get the sleeves perfectly even with how they were set, but I think the pattern of it was pretty easy, though it also goes with how much sewing experience you have what the material is your sewing. Im sure the people at Joanns or any other sewing/material store would be happy to give you some pointers too =] Good Luck!! I hoped all of that made some sense and helped a little.