It may seem clumsy but this is how it was done back in FS9. The alternative was to have these textures in each texture folder thereby increasing the space taken dramatically. Many devs did it this way including the likes of Real Air

Do you have DMFS Shared Files present in your Airplanes folder? If I'm not mistaken, the VC textures live in the associated folders for each model (eg, BAC 1-11 VC) inside DMFS Shared Files. I'll load one of them up to check.
ATB
DaveB
