first of all, you should be informed that most(all?) of the image trackers you see are fake.
Most(all?) of the image trackers you see are fake.(there, you've been informed now)
this isn't however to say that it is not possible to make an image tracker, its just that no one has made a online tracker that uses an image(w/ pcs), text is easier, and is better suited to tracking more people, the
cphq tracker (currently only tracks mascots, but used to accurately track anyone) had a text output.
second the real ones are done with pcs, which uses
php, which you seem to have found out. Currently there is no script to track people that is available for everyone, but there may be soon. I would suggest looking at how to make scripts at penguinclientsystem.com and reading about how to make scripts, read the tutorials first, and then after you pretty much get it, but not quite, ask about that(or if you get it, then go ahead and make one) then you have to write your own script that will check each server for someone and then find what room they're in. However, someone may release a script that does just that before you finish.(cant think of an apropiate somly to put here)
.... ah, and one last thing, it wont be something really easy, youl have to work at it.
oh, and btw, your probably going to be cussed at by the other members...