Disable or remove Windows Messenger

Hello;
I am a new user to Windows XP and I need to find out if there is a way to disable or remove Windows Messenger. I use MSN Messenger and when ever I boot or reboot the Windows Messenger tries to log in using my MSN Messenger Net Passport ID. I have configured MSN Messenger to start up and automatically sign in when I boot and most of the time it doesn't and I get a message that it can't because my Net Passport ID is already logged in on another computer. I really do not want to use Windows Messenger because I have quite a few contacts on the MSN and I have quite a few addresses in my Hotmail Address Book.
Thanks