Unfortunantly the synthesized module for this radio is not available seperatly. The part number is M45671 and unfortunantly is is an item we have never received here in the states. As for the software update that would go with this (if the module were available), Ernie Pritchard (the previous Multiplex repair person) would be the one to perform this software update. (For certain product we still use Ernie for service). He would be the one to contact to see if this update is available (928-474-2528).

...but then again if the module is not available the software update is kind of a moot point.