Stu,
I will not respond as you would only use my reply as an excuse to dish out more points even though I would remain respectful of your position on here and be polite.
Graham,
If you want, I can send you a document detailing the full protocol and what you can do with it aswell as all the extra stuff that a normal monitor doesnt do !
You can also read out maps, make temporary adjustments etc....
Also, I can show you how to add the protocol to standard or unencrypted chips and enable limited features on certain types !
PM me your email address

or give me a bell on 07772528302 between 6pm and 9pm any evening.
(All free of any charge or reward of course)
HTH