Sorry if I wasn't clear - I did indeed wait until I had been switched to digital voice before pairing the DV adapters with my SH2. Once the switchover finally took place it took me no more than 20 mins or so to plug one corded phone into the SH2, pair two DV adapters and set up these phones where I wanted them.
I was just re-assuring the OP that the the switchover was not complicated as he/she seemed to fear.