I guess I should have read that link I posted for R3EA037 firmware a little closer, it posted a customize_upgrade.xml to use. They are using CDA 1211-7710 which according to a list I found somewhere is W760i_1211-7710_R3A_Customized_Brazil. I wonder if it will be okay for me to use this, but why do you say avoid customized CDAs?

Rogers does come with a TeleNav program but in the few short hours I played with it before debranding, I could never get it to work. It would just keep loading and at 96% would say there was some connection problem. However google maps works fine on my debranded phone