I've googled around a bit and searched the forum, but I couldn't find anything about how to edit the tile_database.bin (located in the tiles.pack).

This is the problem: http://forums.totalwar.com/showthrea...d-issue-in-GC?

And I want to fix it. I've successfully replaced it with an older file and it looks fine so far, but I'm afraid that it might cause some issues. The old file is significantly shorter, so there may be some lines missing that the Charlemagne campaign refers to.
I would prefer to track down the issue and fix it properly.
Any suggestions?