1300 is now the new f/w for the B version and it supposed to have the 7 digit p/c search but this is unconfirmed as of yet?
Andrew the map number is a case oif me using Pimp My Nav to do the discs its an amazing piece of programming and so simple to use, it cost me about £30 and it works with all the major manufacturers nav discs I just download my POI off of PocketGPSworld and Pimp my nav does every thing else.
Darren