I flashed a test version of a Touch pro ROM and I ended up with an ugly "Test Only Not For Sale" message on my splash screen.
To fix this, I used dutty's excellent NBHTool v1.1 to extract the splash screen .nb files from a shipped sprint touch pro ROM and then create a ruu_signed.nbh to flash to my Touch Pro.
Dutty's thread and tool:
http://forum.xda-developers.com/showthread.php?t=296311
To use this, simply run the rom update file and voila. This doesn't hard reset your phone, but just in case, DO A BACKUP FIRST.
Cheers!