OK, I rebooted, got no menue, but that's supposed to be normal, logged in ok, and after typing uname -r, uname -v, it seems I'm running kernel,
Which should be the latest kernel, so it seems everything went ok, touch wood.
The Upgrade page says to make the change perminent in the MBR I need to do,
Is this still the case?
Thanks to everyone for your help, nuch appreciated.