First you need is a RSD lite program or flash and back-up to flash or reformat your Motorola,

to enter the bootloader

hold * then the # then power button, your phone will boot to bootloader, and you will see there the flash program of your phone,

start the program rsd lite or flash and backup
then connect it to your computer VIA usb, automatically the program will detect your phone,

i prefer that you first buck up your firmware by using F&B (Flash and backup) then use RSD lite to flash your Motorola,

RSD lite its much easier to use than F&B, but for safety backup first your firmware,

gudluck