Some of the addon planes originally made for FS9 but converted to FSX seems to give problems for some people.
Like me

.
Well, just got an Antonov An-26 where the VC view looks like this...

Not great eh?!
I've been told at Simviation that I might can change the BMP file using DTXBMP.
See this topic
Simviation Forums - Now I can cry
I'm not a very good friend with that program, so if anyone who knows it would have a go at it for me.
Ty