It's necessary to install the .dds file in the other MS406 file. I think that all files with sitz...are not compatible with Bronzavia.
Example : sitz_ms406c1_GreenMP : install "grmp_ms406c1_t" (dds) in DR_MS406_xxxxx...file (example: DR_MS406_GCI-3), after change the name of this file : DR_MS406_xxxxx_t and ,the others files with the new name (mos, m3d, aircraft, xdp, air). Always 5 letters or numbers : DR_MS406_AVORD or DR_MS406_GCI-3 or DR_MS406_GC3-3 etc...
Good luck
André