The PMDG 737NG series (including -600 -700 -800 -900 variants), while being an excellent all-round product, still lacks a few things. One of these is a working weather radar. Well, thanks to some intrepid simmers on the internet, you can now have a realistic functioning weather radar on your 737NG variant. I fly the 737-700 and 737-800 variants, and was able to get it working properly on both. Note that the WXR radar does not include a terrain radar capability. Here are some screenshots of what it looks like, followed by the merge instructions. I do not know if PMDG and RealityXP encourage this sort of thing, but this is provided by way of information only for those who wish to give it a try.

INSTRUCTIONS ON HOW TO GET THE WXR RADAR WORKING IN THE 737:

All of the following assumes you have purchased and installed the RealityXp Wx500!

1. Make sure NDWX.ini is in FS9 root directory

2. Make sure NDWX.gau is in FS9\Gauges

(The above files are not part of the RealityXp installation. They can be downloaded from this page)

3. Edit the panel files

3.1 Decide your 737 variant (VC)

for 737-6/700 with VC panel, go to FS9\Aircraft\PMDG737-700\panel.VC\Panel.cfg

for 737-8\900 with VC panel, go to FS9\Aircraft\PMDG737-800\panel.VC\Panel.cfg

3.1.a. Under [Window00], add

gaugeXX=NDWX!Xposer,0,0 // replace XX with your next available number, mine is 08

3.1.b. Under [Window01], add

gaugeXX=RealityXP_WX500!RDR,2000,512,452,346 // replace XX with your next available number, mine is 26. 2000 here (instead of 0 which you can find in the origional file) is a quick fix to a graphical error

3.1.c. Under [Window08], add

gaugeXX=NDWX!WXPanel,212,96,200,90 // replace XX with your next available number, mine is 01

3.1.d. Under [VCockpit01], add

gaugeXX=RealityXP_WX500!RDR,0,512,452,346 // replace XX with your next available number, mine is 31

3.1.e. Under [VCockpit02], add

gaugeXX=NDWX!WXPanel,564,110,223,105 // replace XX with your next available number, mine is 07

3.2 Decide your 737 variant (2D)

for 737-8/900 with 2D panel ONLY, go to FS9\Aircraft\PMDG737-800\panel\Panel.cfg

for 737-8/900 with 2D panel ONLY, go to FS9\Aircraft\PMDG737-800\panel\Panel.cfg

3.2.a Follow 3.1.a, 3.1.b, 3.1.c only, i.e. you don't need to (and actually you can't, obviously) edit the VC sections.

And voila! That's it. You may have to copy your VC panel files into the winglets variant to get it working properly, but I've tried and tested the weather radar in the 737-700 and 737-800 with and without winglets and got it working fine in both. The weather radar is controlled from the pedestal, and remember, to get it working, you need to press the WX button on the EFIS!!! Try it yourself and see how you like it. I have found it to be a fantastic addition to the wonderful PMDG 737.

In the above screenshot, I've tried to show the cumulonimbus cloud out the windscreen and on the weather radar.