Hello, Huub, and thanks for getting back so quickly.
The texture that sparked all this mess was one from another website that is for an FW190A-4 located in the "Chariots of Fire" collection in New Zealand. The texture is titled, appropriately, "COF." Right now I'm getting a black/charcoal grey interior with the exception of the placards and the instruments. The cockpit and aircraft are fully functional per specs. The "texture.cfg" file that came with the texture has the following entries in it:
[fltsim]
fallback.1=..\..\Classics_Hangar_Fw190A-1\texture
fallback.2=..\..\Classics_Hangar_Fw190A-1\texture.CHH
fallback.3=..\..\Classics_Hangar_Fw190A-1\texture.CHL
Per your reply I see the cfg file gives the A-1 texture folder as the general folder for "fill-in" textures for the aircraft absent those present with the new texture. It seems to then make the step down from the 4096 to 2048 textures via the "CHH/CHL" progression. This machine can do either of them but I'd prefer the 2048s to keep the operating load down on. You mean I will have to change the ".dds" entries in the "CHH" folder to just ".dd," and then change the ones in the lower-res CHL folder to "dds?" I don't want to put the "CHH" folder in a folder of my own making so I can use the lower-res textures in the CHL folder unless it won't cause any harm to the setup. Can I "hide" the CHH texture folder in another place in the FW190A-1 folder, and change the names for the CHL ones currently called "dd"?
BTW this came about because my stock FSX installation had so many aircraft in it it was taking about 40 minutes from choosing the aircraft to fly, to getting to crank up on the ramp. Anything with a prop on the front - or even back - end went into a new installation called "FSX Prop" and with the exception of this installation, so far, there haven't been any problems with the split. Interesting.
I will await your reply before going ahead.