Flashing a Rom or Radio from the 4 gig internal storage

[markygz]

Alright this tutorial given here is great, but I have having one problem I used the Sprint shipped.nph file from my internal hd, and changed the name properly,or so I believe, anyways what is happened the rom is loading very quickly all the way until the end and just stays there, incomplete. If I reset it takes me to the rainbow screen saying I have a "Upgrade ROM code error Please try again" any help on what I can do would be extremely helpful thanks.