1) The mod is completely harmless, compatible with other mods, and does not 'corrupt' existing maps.
2) Simply installing the mod will not make the new dwellings appear instead of the old ones, as the standard outposts have not been changed.
3) In order for the dwellings to be visible to other players, they must also have the 'custom_dwellings.PAK' file, or you can embed the contents of the archive into the map.
Dwellings are generated in IRMG version 1.6.7. Huge thanks to dwp. IMPORTANT! To work with the new generator, you need to have an additional package with new dwellings. Otherwise, when the dwellings are generated, they will be missing from the map. In the TE mod, starting from version 5.8.4 and higher, this pack is already embedded in the mod's content. To avoid glitches and desynchronization when playing with the TE mod 5.8.4 and higher, the additional pack with dwellings must be removed from data.pak.