I have fs2crew installed for the MaddogX. After loading P3D, under "vehicle" the fs2crew main panel appears when I run the MD82, but is missing when I run the MD83 or MD 88. I have verified the fs2crew box is checked in the load manager for the 83 & 88.

I don't think we officially support the 83 and 88 if memory serves correct.  The Maddog version is over 4 years old now.

However, what you can do is manually copy and paste the FS2Crew panel.cfg entries from the 82 over to the panel.cfgs for the 83 and 88.

Then FS2Crew will load in those planes.

If you do that, ensure the Windows are in numerical sequence in the panel.cfg file.

Best,