Shoutbox

In your case, you should first see if you can log on to the X11 GUI as root.

If not, here are some instructions on remounting the NTFS file systems, so that they are readable to all users:

http://www.linuxforum.com/linux_tutorials/1/1.php

You will, at least, need to launch a root shell to do this.  su and sudo commands may help there, depending how your LiveCD works.