To be honest Glenn if you want the full icp experience i would give the dpr chip a miss,there are too my knowledge only two or three people that have used these succesfully,they are a pig to solder to for the lighting options and you have to remove the chip board from the dpr trapdoor to be able to do all thats needed.
I have now had converted all my lmp and sports gt cars from dpr to the retro solder in saloon chip and they are fab.
The throttle pro units are at the moment able to offer on the fly braking and switch the head and taillights on or off,the brake lights remane in operation regardless off settings.
There are plans for the tp units to soon be able to use the red button as a kers fearure, this is being tested at the moment.
To enable the above options you need to check the aux transmit box wich is within ssdc,from memory the setting is under the chequered flag icon.
At the moment icp is at V3 and when you id a car in ssdc the cars lights flash three times to say that the id has been done and to say what version you are running.