I need to audit a user to see if they are using internet radio (Pandora, shoutcast, etc). Normally, I just ask them to use their computer, however I am not in the same facility as this person, so I need to know of a way that I can either monitor their workstation silently (without them knowing), or if that's not viable, log on as them, with out changing their password. I am the administrator of the domain, so I have admin privileges on that workstation.
Remote workstation is Windows XP Pro.