I guess my computer is retarded, It still doesn't have any "upload custom avatar" type option. all it has is a "list" link, a scroll down menu to choose right there and a red X to my old avatar that i deleted out of my HS gallery.
ya, the avatars shouldn't be too big ... but there is no way to control the size. if they get out of hand on the size, i go in and delete them muhahaha. but if you wanna upload one, it has to follow the rules of 80x80.