Well I extracted mv_root-hdg.tbm from mv_root.vp and placed it in K:\Games\FreespaceOpen\FS2\MVPS-4.1.23\data
I then modified one little item to test it out. I moved it to .25 instead of .5 (which is how I tested FSPort to make sure it was working) but when I ran FSO using VPS-4.1.23 there was no change. Here is what I changed
+Mini Target Shields:
Origin: (0.25, 0.5)
Offset: (-25, 86)
Filename: 2_targhit1
3 Digit Hull Offsets: (12,13)
2 Digit Hull Offsets: (15,13)
1 Digit Hull Offsets: (20,13)
So again I am pretty sure I have the correct file and I know what the change does on the screen but I am unsure as to where the extracted file should go if the above directory is not correct.