I'm still here too :-)
This is pretty much it. Open up the light cluster and get a good connection to the earth part of the metal links inside, then run that cable to a good earth. I'm not really in a position to get photos at the moment sorry, but I do remember that it was very clear from the connector which connection was failing and was therefore the earth.
If you really need a photo, I could probably get one on Thursday - if you need it, let me know by email ASAP, and send a reminder on Thursday morning
- got the memory if a sieve :-)