Thank you Arno. I have a msg from Vikram saying that my new device has been linked to TomTom Home, now I am going to try to figure out how to get my maps uploaded to the GPS. I seem to recall a post somewhere explaining how to do this, I should be able to find it.
Before you do anything else, connect your 720 to your PC and look in Explorer it should be shown there as a separate drive.
Make a Folder on your Data drive and copy all to it.
Then got to TomTom and download Home if you do not have it already.
After opening Home connect your device and follow the prompts.