Are you currently stock froyo or gingerbread, or are you running a custom rom?
As far as a data wipe, is really simple. There are two ways to do it.
Method 1: go to settings>privacy>factory reset and it will return your phone to out of the box condition.
Method 2: power off the phone, power back on holding the camera button and home button. When the triangle with the ! Appears press the search button. The use the volume buttons to navigate to format data and cache and use the camera button to select. When it's finished use the camera button to select reboot. This will also return your phone to out of box condition.
As far as sbf, you need three things on your computer.
1-rsdlite 4.8 or higher
2- either 2.3.340 (froyo) sbf or. 596 (gingerbread) sbf depending on what your running and if you want to root or not.
3- Droid x drivers.
#'s 1&2 can be found at mydroidworld.com under the Droid x section of the forums and the drivers, do a Google search to get to the Motorola site.
To sbf, there are two ways to do this as well.
1- connect your phone via usb. Once connected put your phone in "PC mode".
Open rsdlite, press the ... button and find the sbf file you downloaded. Double click on it to load it. Next, make sure your phone shows up on line 1. If it does press start, if it doesn't unplug usb and plug back in. Once your phone appears on line 1 press start and your phone will automatically switch to the bootloader and begin to flash the os.
Method 2- manually put your phone into the bootloader. Power on your phone holding both volume buttons while pressing the power button. Once you see the screen flash let off all the buttons and your in the bootloader. Follow all the other steps mentions above to flash the os. It also helps to watch a YouTube video or two on how the process works.
Sent from my DROIDX using DroidForums