There is a reason why the GAUGES cannot be installed using an automatic installer. In this case you must manually copy/paste the GAUGES folder where it belongs to insure the gauges properly install.
1.
Copy the folder from this directory:
Gauges
...and PASTE it directly into your Flight Simulator directories as shown below:
For FS9 (FS2004) Users:
C:\Program Files\Microsoft Games\Flight Simulator 9<------------open this folder and paste it inside
For FS2002 users:
C:\Program Files\Microsoft Games\FS2002<------------open this folder and paste it inside
If your version of Flight Simulator is located other than where I have indicated above you MUST browse manually to the correct location.
2.
If/when prompted, say: YES TO ALL to allow the Copy/Paste process to complete. If you are concerned about overwriting newer gauge files, you may select just "YES" to monitor the copy process one file at a time. I have not had any issues expressed to me about overwriting gauge files with this package.
Once the process completes, the GAUGE files are now installed.
3.
OPEN the directory INSTALL_SECOND, located inside the INSTALL NSC_FINAL folder and follow the instructions from the provided readme in that folder for the PANEL file.