Need your help, I am switching computers with my sisters and I'm going need to switch addresses but I have no idea on what my password is for my email address how do I get it? It is the Outlook Express email by the way

Best bet is to visit your ISP'* website and reset it.

or

if you us the "files and settings transfer" wizard (fastw)built into Xp it will transfer the password along with everything else about your OE account; including all your mail. You can use 'fastw" to transfer all of your documents, music, etc... just not programs(they need to be installed) I would recommend you run backups first then save the fastw file to removable media like a DVD+R or USB drive

Please read some of the MS articles first, so you get a better feel of what it can and can't do.
http://search.microsoft.com/results....ransfer+wizard