That was a typo, the name on the sd is gmapsupp.img. The only maps I have on the 2689 are the AUS and NZ ones that came with the device. The gmapsupp.img maps do not appear in 'my maps' and I'm still getting the 'can't unlock maps' message.
Here is a section of the details tab of the EU map from GMap Tool
Regards
G
[Only registered and activated users can see links. ]

I had some osm maps from an sd card on my Nuvi 50. I put that sd card in my 2689 and it read and accepted them straight away, so I'm figuring I've done something wrong with the download process.
So I'll start the procedure again, but which map set and what files? Where do I get that info?
G