Default [Q] Question about changing firmware of GN3

Hi folks, I have a question about changing the firmware of my GN3 and didn't found a good aswer for it...

I'm from Brazil and got a Verizon GN3 bought on USA, I want to change my firmware to a international version of GN3 or a version that has the PT-BR Language option, someone know if that is possible to do w/o bricking the phone, and if yes, point me a link to the correct firware...

thx in advance...