I have some older 7982s currently connected to a vSZ running 3.5.1 that will soon be replaced. I want to donate the 7982s with an older ZD1100 (running 9..9.1) to someone, but I don't know what I need to do to the 7982 to get it to be recognized/usable on a ZD1100 again. Is there a special firmware I need to put on it?