OK, I am back again. I have done the updated Kindle jailbreak (the one designed for the most recent firmware); press the screen on that document etc etc so I am presuming the kindle is now jail broken. But when putting python into the root, (I didn't unzip, just copied it straight over) when I eject, settings - update - that option is greyed out.
Never mind, it seems I didnt need to do python after the jailbreak.