Below is a crude fix issued months ago:
FS9 Planes that Work in FSX Acceleration
A26 by SOH
Operating System:Vista
Files: A26SOH.zip @ sim-outhouse.com
Graphic Card/ nVidia driver: nVidia Forceware 8800GTS/169.04 and probably earlier
DX9 Mode
The 2D and 3D panels and windows work ok and are very nice. No self shadows.
This is a crude fix of the decal section of the a26 for the "Hard to Get" repaint of this a/c. It merely covers up the decal with a solid unpolished gray. It will look better than invisible sides. The other paints could be similarly modified using a paint program to select the proper color.
The decal fix can be accomplished by going to the "Hard to Get" texture folder, deleting the DECAL_noseart.bmp file, copying and pasting the gray.bmp file to create a gray - copy.bmp file. Rename the gray - copy.bmp file to DECAL_noseart.bmp. ( The gray - copy.bmp file name is Vista produced name, XP produces a different name.)
Two other fixes do better than the above, one for the props, the other for the guns.
Props: Suggest using prop_super_king_air.2.bmp from afgb300fsx.zip in place of spinprop.bmp
Guns: Use DXTbmp to load and save as "DXT1 opaque" the guns.bmp file.
DX10
Mostly white, gray and black textures. Untested: Converting the textures to DXT1 opaque. Would expect loss of reflective ability.