J0313, you talking about this map in the Control Room (F2)? Pardon my use of "solid wireframe"... for some reason, the poor widdle duo-core isn't doing so well at rendering the Gato interior dat...
I don't remember who it was (skwasjer?? Ducimus?? SomeoneElse??) who had a [TEC] thread on separating the map from the desk, and then being able to change the image... I do not recall the folder for certain, but Textures? but Data / Textures / TNormal / tex / has "Map_Strategic.dds" along with 1-6 of them in FotRSU, ~and~ a "map_table.dds" file... but I might just be sending you down a rabbit hole with this!...
So TMO, FotRS (TMO v1.7) and FotRSU have it separate...