OK, assuming you have an RB2 Mygig like mine (it is on the face plate in the bottom right), then this is how I did it. First of all the 2011 version can only be upgraded to version RB2 10.00.11 - I think later versions were able to go to later versions of the firmware (v33 and v50). I tried them but they seem to be for different hardware. To get the firmware you need to get a file called "RB2 10.00.11.iso" and use what ever software you have to burn it to cd.
The file is hard to find so I had to use the link in the post below:
http://www.ramforum.com/f51/res_rbz_...83/index3.html
The actual link is:
http://www.mydrive.ch/browse#/751831...0RBZ%20-%20RB2
The username is mygig@soxag and the password is gasolio.
This all looks very dodgy, I know, but I have already taken the risk and tried it and it works fine.
As the link says:
Burn it to a cdr as an ISO
2. Turn the key to ON (not ACC)
3. Turn the radio OFF
4. Press load and insert the CDR
5. Follow the onscreen instructions - Press yes to update to 10.00.11
There you go....