NHF – new heroes for Heroes V 3.1.

The program can be used to modify everything that already exists in the map archive, and you can add your own files, based on the data from the same map.xdb file, for example. It will be difficult to do anything with the terrain, as the file is very complex.

Added 8 minutes later
It will need to be improved so that it only unpacks the necessary files, and not all of them.