Need the instruction manual?? - which lorry did this fall off!!
A lot of radios (the Icom for example) will only let the user set the MMSI once easily! - After this you need to have it done by the factory or somebody with the special cables!
Anyway... Now to try and be helpfull! - Does anyone speak Norweigen?
Ah thats better - in English - and they have the manual for the radio but on a locked page of their site - maybe a nice e-mail to the enquiries and they might send you a copy!!
Failing that their UK dealer is marconi - www.marconi-marine.com
ps - MMSI - Maritime Mobile Subscriber Identifier