I have a x910bt. I modded it to a custom image that was awesome and worked awesome. However, I found a screen that was a map option. I picked the Navteq maps. That was it my system stopped working. I added maps, deleted maps, tried to do everything to get my totally awesome system back up. In the process I deleted the mbr from the blue screen list of options. I am desperate to figure out how to re-install the boot files.
If you could send me a copy of your mbr, I have a large collection of "my flash disk" files and two full mods. kcell at cox dot net