Great link, thanks!
There's a very interesting picture halfway down that seems to illustrate the now infamous incident of the "Von Graff" story and the yellow Focke Wulf. Notice that there's yellow I.D. markings on that Fw190 but it's not all yellow as can be believed from the book... The I.D. markings looks unlikely but at least more likely than an all yellow Fw190...
Does anyone know whether these drawings were actually made during the war or later? (The yellow noseband on the Fw190 looks very much like the markings used in the east by Luftflotte IV in the spring of 1945 so I'm thinking it might be a drawing done in a later period and inspired by latewar markings used by the Luftwaffe)
Cheers! / Anders
EDIT: Never mind, tried google translator and it seems that they're really from 1943. Interesting!