Hi Ralph
Simple answer is that I honestly don't know. I've a theory which has been proven in the past.. simicon assignments/GUID's.
Some icon/window assignments changed in FSX.. other windows have to have rendering turned on/off. I don't have the Dove in FSX but I'll take a look
EDIT:.. Boy, has this kept me occupied for a while or what!

OK.. I've tried a number of variations on a theme and the one I've had most success with is this...
For [window00]
after ident=MAIN_PANEL
add this line below.. render_3d_window=0
For [window01]
change the line visible=0 to read visible=1
ident=6
add render_3d_window=0
There's something about the window combinations that means that with [window00]..render_3d_window=1.. some of the panels work fine but not all and with [window00] render_3d_window=0 some but not all work. By making window00 render=0 and making the lower panel=1 (visible) the lot will work. What it means is that when you open the aircraft, the lower panel will be visible. Close it down using the 'X' in the top RH corner and it will work fine as will all the others. I'm too confused now to take it any further but at least this is a workable solution and only a minor inconvenience
The sections above are in your panel.cfg by the way

Sadly, FSX doesn't tolerate 2D views so nothing can be done about those
ATB
DaveB
