as far as this ROM goes then you need to have the unlocker on your computer make sure you back up everything you have on your phone to your computer. doiung this wil wipe your memory. once you have the unlocker on your computer then you make sure you have your phone connected via activesync then go to the unlocker and run it. follow all its instructions to the t it wont be hard by any means as i have done this to several phones. after you have the phone unlocked the run the leaked rom from sprint. after that has run then you take this it is a rom update utility you get it right here.
ftp://ppcgeeks.com/Titan/RUU/
download the RUU item then extract the RUU to a folder that you created and named no2chems 5068 i say that because that is what i named my folder then extract the .nbh to the same folder you extracted the RUU to then run the rom update utility.