XV6800 VZW to Sprint

[bnsaflsujt]

Hi everyone! First time poster, because this is my first time to actually own a WM phone. My father is giving me his old XV6800 that he used on Verizon, but I am currently stuck in contract with Sprint, so I need to know EXACTLY what I need to do to get this working with Sprint.

For now, all I want is the stock Sprint Windows Mobile 6.1 Professional on the phone. I downloaded the Sprint ROM upgrade from HTC, but I am unsure if this will flash the phone seeing as how it has a VZW rom on it now. So do I need to un-lock, and use a rom, and if so, can someone point me to the rom I am looking for???