Weather Radar Mod for WX Advantage Radar

Of course, it is. All you need is to assign a window to the  WX Advantage Radar in the declaration and then an appropriate window definition. For example, I have the WX radar assigned to
Window08.

[Window Titles]
Window00 = MFD640
Window01 = AUTOPILOT
Window02 = TOGGLE_CONTROL
Window03 = INFO
Window04 = ENGINE SETUP
Window05 = START
Window06 = Flight1 Garmin GTN750 U1 - DO NOT MODIFY
Window07 = Flight1 GTN Stack - DO NOT MODIFY
Window08 = WX Advantage Radar   <--- Works now with Shift+9 keyboard combination in 2D
Window09 = Flight1 Garmin GTN750 U2 - DO NOT MODIFY

Now I understand! I just added the radar under window titles, as you and Ed mentioned.

Thanks guys, I learned a lot today!