[bakntyme]

1. Using a PC, format a microSD card to FAT32.
2. Using winrar or an unzipper, extract the RUU_signed.nbh file from the ROM upgrade .exe.
3. Copy the *.nbh file to the root directory on the formatted microSD card
4. Rename the file on the microSD card TITAIMG.nbh.
5. Insert the microSD card into the phone and reset into bootloader (power, camera, reset).
6. Follow on-screen instructions on the phone.

This apparently requires the phone to already have the appropriate unlocked bootloader installed (Olipro 2.40 hard-SPL in most cases). Some users have been unable to use SDHC (4gb and up) cards.