Accessing password-protected My Documents folders on old hard driv

My old hard drive kept having corrupted file errors in the System32
directory, so Windows wouldn't boot. However, the rest of the files on that
drive were still accessible when the hard drive was put into another
computer.

I now have a new computer with Vista, and installed my old hard drive as a
secondary hard drive on the new computer. I'm trying to move all the "my
documents" files over, but I can't access them since those user accounts had
been password-protected. I can access other folders just fine.

How can I get access to those folders so I can bring them onto the new hard
drive when I can't go back and log into those accounts and remove the
passwords?

Thanks.