.rpm files
RPM files are stores of static map content. They are a simple xml format. RPM files can be overriden from your mod folder.
In the following example only a single cell is merged with the existing contents of Joppa.RPM. If Load="Merge" is not supplied, the contents are replaced instead.
Example Joppa.RMP from Two Ctesiphus tutorial mod
<?xml version="1.0" encoding="utf-8"?>
<Map
Width="80"
Height="25" Load="Merge">
<cell
X="41"
Y="7">
<object Name="Ctesiphus"></object>
</cell>
</Map>
Add Comment