Area51 Simulations & GTN750
If anyone has the Flight1 GTN750 AND any of the following addons from Area 51 simulations....
OH-58
B-2
RAH-66 Comanche
...I have modded the cockpits to include the GTN750 unit.
I recommend backing up the panel.cfg files for each aircraft before making these modifications!
OH-58:

Replace the existing "gauge04" line in the VCockpit01 section with this:
gauge04=F1GTN!GTN750VC, 407,9,365,362,UNIT1 //center diplay
B-2 Spirit:

Replace the existing "gauge01" line in the VCockpit01 section with this:
gauge01=F1GTN!GTN750VC, 558,493,298,302,UNIT1
RAH-66 Comanche:

Replace the existing "gauge08" line in the VCockpit01 section for both the Recon and Attack helicopters with this:
gauge08=F1GTN!GTN750VC, 49,530,337,415, UNIT1
OH-58
B-2
RAH-66 Comanche
...I have modded the cockpits to include the GTN750 unit.
I recommend backing up the panel.cfg files for each aircraft before making these modifications!
OH-58:

Replace the existing "gauge04" line in the VCockpit01 section with this:
gauge04=F1GTN!GTN750VC, 407,9,365,362,UNIT1 //center diplay
B-2 Spirit:

Replace the existing "gauge01" line in the VCockpit01 section with this:
gauge01=F1GTN!GTN750VC, 558,493,298,302,UNIT1
RAH-66 Comanche:

Replace the existing "gauge08" line in the VCockpit01 section for both the Recon and Attack helicopters with this:
gauge08=F1GTN!GTN750VC, 49,530,337,415, UNIT1