Ask one of your friends (who has MSN, and has you added to their friends list) what your address is, simple. If you can't do that e-mail MSN and see if they can do anything. If they can't do anything, then you'll have to sign up for a new e-mail address.
how did you forget your email adress?... go into your profile and see what your email adress is that you signed up here with.
I signed up with a different email here, and i dont use msn to talk to friends i use yahoo, i use msn to talk to people about buisness deals