Any knowledge on TPMS

I didnt know whether to post this in the Tech section or not. Its not really Stang related.
I work @ a Tire/Service center and we are learning more about TPMS (Tire pressure monitoring system). We see a lot of newer Yukons, Tahoes, Ect.........
I went to Baltimore for a week on training for this stuff @ the beginning of May. Anyway we just got an OTC scan tool to diagnos problems in the system and also to help with relearn procedures. I tried this tool on 2 different vehicles and really did not have much sucess with info from it. 1st was a 2004 VW Toureg and the other is a 2007 Yukon. Some luck with the VW but nothing from the Yukon .
Just wanted to know if any of ya guys are familiar with this. Tech support was not of much help .
This system will be mandatory in all new models by the end of 2007. Yes even in the Mustang So any help would be appreciated.

We know the concept of the system. Ive replaced a sensor before. You have to torque the stem nut in in-lbs. They also take different valve cores that are nickel plated. We have changed hundreds of tires on cars with TPMS, but was more concerned on getting the vehicle in learn mode to reset. Some of these cars have to be reset after a simple tire rotation. We were informed that all Japenese cars will have to go to the manufacture for relearn procedure if a sensor is replaced. Then you have to get all serial #'s and position of the sensor so it can be programmed in with the others.
Man this stuff is becoming a pain in the arse.
Any other info will be appreciated. Thanks for your reply FarBeyondDriven.

It's cool bro. This dern OTC scanner is hitting my last nerve. I was hoping someone would cue in and say they have had issues also.