[Hampshire] Restricted accounts for jukeboxes

Just wondering if anyone has ever set up a restricted account on Linux
that basically only allows the user to run audio playing software? I'd
originally thought of using a live distro, but I think most of those
give root access too easily. The only other way of doing it I've seen is
to use a custom Xsession.

Can anyone offer any experience/advice on this?

Thanks,
Leo