if you can browse to your PC via my network places you can get to some bits of it. Without looking at the setup i couldn't tell you exactly where you can get to. If the Admin account or specific user has a password set and the folder hasn't been made private deliberately you should be able to map a drive to it or browse to it in IE.
It should prompt for username and password when you type \\server\documents and settings\User\documents
or the alternative if no password set is \\server\documents and settings\administrator\my documents.