When you arrive, pick up the costume and instructions from the basket of bones.
(Click photos to enlarge.)
There's probably a serious meaning to all this (maybe something about the philosophical significance of seamstressing, red high heels, and sew on and sew forth), but I'm not that smart so I'm going to take it as a fun treat.
To those of you who feel uncomfortable about wearing women's clothes, just a reminder: this is SL, you're looking at a bunch of pixels, so please -- get over it. That goes for the males among you, too.