Thanks for the help Fubar.
Tried the .dat extract tool you mentioned, it works fine. I was able to place your IXB 'mask_type9.tga' file inside the other mod; Radar-Extend's 'Sensors.dat' file.
I'm still wondering, if I use JSGME to apply the Extended-Radar mod, then apply your IXB skin, it still says I'm overwriting the Extended-Radar mod's 'Sensors.dat' file, which contains several other files.
I looked at both sensor.dat files. The only thing that seemed different (file-size wise) was your 'mask_type9.tga' file.
If I overwrite the Extended-Radar 'sensor.dat' file with your IXB skin (using JSGME), does it cause any harm to either mod?
It seems I must have messed up something, as I see the bridge dial-compass not in the correct place, as shown here:
p.s. Btw it looks like I could just extract the IXB .tga files and place them in the 'Texture' folder, but then they could interupt/overwrite other sub-skins.
Thanks for any help.
Edit: oops, looks like the Stock-skin IXB has the same problem on the Bridge(?). Pic below: