I've got loads of stuff on these somewhere, probably back home in the UK.
However, KG 200 also operated B-17G's too. There's another book;
KG 200 the true story, 1978, by P W Stahl, published by Motorbuch Verlag of Stutgart. It's an excellently written narative by one who was there, detailing how & where these aircraft were used. He didn't know of the infiltration's of US bomber group's so whether it actually happened is a good question. But given the state of things in the late war, and the secrecy in KG 200 it may have, I assume, Why else would the USAAF build the YB-40's?
I do have details here of a B-24H, used by KG 200. 41-28779 of the 389th bomb group. Crash landed near Stettin June 20th 1944. Used by KG 200 as KO+XA.
Destroyed by fire April 1945 after a noseleg collapse. pictures were published along with an article in Aeroplane monthly, November 1994.
The pictures also show 'Wulf Hund' wearing crosses, and another B-17.
This has been a bit of a pet subject for me for years, I've got lots of stuff on axis aircraft tested by the allies too (Did you know there was a repair organisation in Australia rebuilding Japanese aircraft?). I didn't know about that Squadron book, I'll have to see if I can get a copy, Thanks Pixilater!
Pete