just because i had it up
From XDA Titan Wiki
Flashing a phone with a micro SD card
1. Format a microSD card into FAT32 with an allocation unit/cluster size of 1024
(the default size for a 1 GB would not work, also if it takes only a few seconds to format
try formating with some other slot/device. A 1 GB took over a minute to format correctly)
To format your Card - Open a DOS box and type/copy and paste this: ( format ?: /FS:FAT32 /A:1024 )
Replace the ? with whatever your SD cards drive letter is... ie: f, h, I.... Mine is G....
2. Copy the ROM to flash (xxxxxxxx.nbh) to the root of the microSD
3. Rename the ROM xxxxxxx.nbh to TITAIMG.nbh
4. Insert your card.
5. Force into the boot loader with POWER-CAMERA-RESET
6. Follow the instructions and you'll quickly flash your Titan...
This will work to flash with an official ROM and radio, I think regardless of the boot loader you have installed. But ensure that you have the correct boot loader (olipro 2.40 for this GPS ROMs) installed for when you do eventually finish with your flashing and are ready to boot into the OS.