The other way is to simply append the tiles to an existing set but I can't get them imported into FlaMe. FlaMe doesn't see the new tiles, presumably because the .ttp file needs regeneration or something.
In the screenshot below it shows tiles 80+ not showing in FlaMe for the Urban tile set and I added many tiles after 80+

I have no problems replacing existing tilesets (that's how I made custom maps before) but I could never figure out how to get additional tiles to appear correctly in FlaMe. Anyone know how to solve this?
I'll make a custom campaign 4 with various new tilesets if someone can figure out the best way of adding new tilesets. I already have the tilesets, I just need to figure out if we should make a tertilesc4hw or append to existing. Are there any limits on the number of tiles per set? What if Arizona had 200 tiles? What are the implications.
EDIT: I got the tiles to appear correctly up to 95 but I don't understand where this 95 limit is defined. It's not in the .radar file or .ttp. So where is it?



