wait, i just checked the FIA GT website and it says the #4 car will miss the last 2 races because it was the one that had the big crash in Oscherslaben. and the #5 car will still be driven by anthony kumpen and mike hezamens and might be joined by philip alliot or david halliday as a 3rd driver.
http://www.fiagt.com/newsitem.php?key=223