Upgrading to 3.35 on verizon xv6800

[sfetaz]

I just got my new verizon xv6800. My objective is to use a kitchen for a custom rom and to enable GPS Function on the phone. I have spent the last 2 hours researching this and am stuck. I downloaded the rom update from the official HTC website, 3.35. I was following a guide that I thought included verizon users in the guide but when I attempted to install the update, the software said invalid carrier ID. Made me realize this is for spring phones. But this rom is the only one I can find that is able to use the GPS functionality of the phone. Obviously I am missing something here and wanted to know what I have to do to install this rom, and if not, what is the verizon rom that works with GPS?