Thanks for the support Guys - I appreciate it.
I have now followed the instructions (from somewhere?) and have GUPDATE_Patched GCD and GUPDATE_Patched.rgn and updater.exe in my system folder.
I tried to enter pre-boot mode about 20 times, finally I pressed over the battery symbol and the model number appeared briefly in updater. When I pressed 'okay' a message "could not find file path F: system/ GUPDATE Patched .rgn and a message from windows telling me there is something wrong with my drive. (I reckon there's still something wrong with the operator! But we'll get passed that)
Geoff RBG