Gentlemen,
Today i received 2 "new" processors (Xeon 5060 in stead of the old Xeon 5050). I installed them promtly and who should have guessed: all works fine, windows installs without a problem.
I guess that the Xeon 5050 processor had a driver issue or is just not compatable with the Win 2008 R2 or 2012.
Thanks for all the help and sugestions tough. It was nice to see that there are that many helpfull people onloine on a forum like this.
The only problem now are the fans, with 1 processor they were fairly silent, now I have the constant sound of a fighter squadron behind my kitchen, well at least the darn thing works :-)
Kind regards
Morris