I think all that can be found in the xml and in the prefab editor.. The facenorth is 0. The y offset is -7. The size is 81,47,78. As for the .pille file, I'd assume that's from pilles prefab editor, which is another thing ive never used lol... Maybe just loading the prefab into that editor and saving it would generate a .pille.... But i'm not sure.
Also note that the xmls are set to have this:
<property name="Zoning" value="ResidentialOld, Commercial" />
<property name="AllowedBiomes" value="burnt_forest,snow,plains,pine_forest,forest,desert" />
Not sure if that's needed for nitro or not.