The fuselage textures are MkV_f1_16.bmp and _f2_. these should have been installed in the texture folder when you unzipped the model.
I assume the other parts ie wings are textured OK?
Not aware of any issues on this model. Check the texture folder for the above, and if problem persists drop me an email and I'll send another set of textures.
You could try copying another YAS texture set into 538 to see if they work. MkV DLN or DLU should work.
Merlin66,
yas.spitfires@rbbs.net.au