No worries, Redrobes, I haven't had time to read this board since the weekend anyway.

Isn't 2048 x 2048 going to distort the map sections, making them square? I know it won't, cos you'll have that all figured out, but I'm just curious about how it works.

I could convert the images from jpg to png using Gimp if that helps...

Agh! you've brought up a potential problem there with the XY numbering. Right now they run alternate numbers, so 2,4,6...20 form the ten top row images and 3,5,7...21 form the next row, etc. That probably means I'd have to re-number the files before importing them, yes?

Yes, still on the old address.