Um, since we don't even know who
you are and if your underlying motive is truly golden I don't think we would be recommending ways to crack passwords (which I believe would be termed an "illegal" activity according tho the Forums' Terms Of Use, and therefore be prohibited).
Write to MSN, explain the situation and if they will give you access. They may be willing to re-set the password and send it to the e-mail address associated with the account. If you don't have access to that address and they send it elsewhere then let me know because if they are willing to do that then I am gravely concerned about the security of
my account with them!