1. Download and unpack the attached file. (1b and BMW-FSC Generator)
2. Get a USB stick, needs to be a small size, I tried several sticks, 4gb, 8gb and 32gb, but the only one I found that worked in the car was a old 1gb formatted to FAT.
3. Put the files in the 1b folder in the root dir of the formatted usb stick. (You only actually need the copie_scr.sh and fsc.bat files)
4. Go to car and turn ignition on, then sat nav, wait until sat nav is booted up.
5. Insert USB stick into port in glove box, wait about 30secs.
6. Put USB stick back into computer and you should now have a 1b.hex file on the stick.
7. Open the BMW-FSC Generator program, open the 1b.hex file, select map you've downloaded and generate the FSC.