I've got an existing wired C-Bus system with 5 dimmer units, but no programming interface. It was suggested in another thread that I take a look at getting a PC interface, so I'm considering it at the moment :). If I bought a 5500PC and connected it to one of the existing dimmer units, would I be able to download the existing programming in to the toolkit so that I can modify things, or would I need to re-program the system from scratch?