I have been reading through these posts all night. I am having the sam problem with trying to relock my phone and have followed all of the instructions I could sort out.
Here is what I have done yet far
-- I have succesfully flashed to the shipped ROM from the USB connection.
-- I have downloaded the relocker zipped file, unzipped it, ran the executable and took the signed NBH, renamed it to RAPHIMG.NBH
-- I formatted my Kingston 2 gig SD card to FAT 32 by setting the Touch Pro to connect as hard drive instead of active sync, then formating from the OS.
-- I then took the relocker renamed nbh file and placed it in the root of my SD card.
-- I hold down power and volume down for a soft reset
-- My phone instantly jumps from the tri colored screen to a grey screen showing "Loading..." forever.
EDIT:
To clarify I have also downloaded the SPRINTRELOCKER.ZIP which contains a RAPHIMG.NBH, extracted it, and placed it on the formated Micro SD card. Then I used the setmanual to flash it from the phone. Flash completed succesfully, but when I go back to the bootloader it still shows that the security is unlocked.
What am I missing here? Any ideas?