Speedbird144, Rereading your post, I think you already succeeded. If you can open up XGauge, then it worked. As VonMar did, I would try and install to ALL aircraft....or at least try and install to the non WL versions of NGX. I did it manually, steps below:As VonMar did, I would try and install to ALL aircraft....or at least try and install to the non WL versions of NGX. I did it manually, steps below:1. Go to your flight simulator folder (wherever you put it on your computer)SimObjectsAirplanesPMDG 737-800NGXPanel folder2. Make a backup of panel.cfg3. Open up panel.cfg in Notepad or Wordpad.4. Find lines that start with "Lower DU" and "[Window 8]"5. Make it look like this://// Lower DU////[Window08]//BACKGROUND_COLOR=30,30,30//size_mm=451, 424//window_size = 0.2348958, 0.3533333//position=8//visible=0//ident=408//zorder=95//gauge00=PMDG_737NGX!DU, 0, 0, 451, 424, LOWER #4[Window08]size_mm=240,193position = 5Visible = 0ident = 14991gauge00=XGauge!WeatherMap,0,0,240,193I basically commented out the original PMDG reference to the 2d gauge and then added the code to replace with XGauge. I recommend changing size a bit as this size is too small. I just resize when I bring it up and have been too lazy to resize in the cfg file.6. Save panel.cfg7. You are good to go.Hope this helps. Again, by doing this, it adds XGauge to both the non-WL AND WL versions of the 800.George Shimada