aurio

hi! I have a pioneer avic f900bt european version with Fw 2.09. I would like to upgrade to 3.0 or 3.1,but I did not understand how to do this. I just realized that : 1)the first thing I should do is backup security Avic. 2)backup save on my PC; 3)and then update the AVIC with a custom firmware. I want to know if is there a guide to the European model? sorry for my bad english. thank you very much