Quebec001 and Catymag - thank you both for the support.

Catymag, yesterday I downloaded gmapprom.img and renamed it to gmapprom1.img and put it directly in the .System folder on the nuvi. So now it shows in BC as Not lockable.

The map even shows in my device under myMaps. I just can't see the maps to search for addresses etc. How can I choose/view from multiple maps on my device? (I unticked the existing ones, no luck though).

I also realised the problem is not having all the PC Install files extracted from Kenta's post. I don't have the .msi files etc. Trying to download again and hopefully that will help.

Thanks again