TS Manager for XP?

Ok, here is something new. In our environment we are using Virtual
Workstations remotely. I am already aware that only 1 person at a time can
be on an XP workstation.

What I am looking for, is there a way to determine when someone is logged
into a workstation and to see how long they might have been idle? I would
like to use something like TS Manager that gives you a list of users that are
logged in, lists if they are idle, and shows you from where they are
connecting.

If there is a 3rd party app then I would also be interested in giving it a
range of IPs so I can see all workstations at once versus trying to query one
at a time. I am thinking my ultimate solution is going to have to be to
write a script that can query each workstation to see if a user is logged on
and if they have been idle.

So, if anyone knows of some tool that exists already I would appreciate the
info.
--
Donald Palmer, MCSE