Help please with identity hijacking

[XPatriot]

Hello folks...

I was wondering if anyone could possibly tell me how someone could have discovered not only the passwords to numerous hotmail accounts when some of them are not only unknown to anyone other than me and when all are unrelated to one another... used in separate identities in Outlook express?

Also if possible is there anyway that I could connect to a ip address (of the suspected hijacker)? I know the IP address as they have sent me an email from one of my accounts..

I have sent numerous emails to Hotmail without any assistance..

Thanks..