Hi Warren, there's info about fastboot on the M96 wiki page, you just need to power off and start up again, holding down power+next buttons.
I didn't re-flash the whole update.zip just the boot partition, so it's not like a factory reset, your data wouldn't be affected unless the whole thing
does somehow go horribly wrong. Still, I'd take a backup anyway, just in case!! The command would be something like
Code:
fastboot flash boot {FILE}
Have fun!