Thread splitted.
I believe lightmaps can't be swapped, but I'm fairly sure that swapping the other maps work, since I got that texture animation code to work.
In this case, there is a slot called "NormalMaps" in BPCore (unfortunately, not the Graphics type of "Normal" maps, in this case the "usual" maps), which acts exactly like SDT does for ships.
The idea is that you only need to "copy" the plugin (from scripts/Custom/Autoload) and add that slot with your retextures.