After lots of fiting i finally managed to let all PC see eachother and all PC are printing to the B&W Printer.
However I have a colour printer directly conected to my Vista PC (working Properly) I added the printer as a network Printer on all XP PC's as well. non can print through the network. mostly theres no error message the document just sits in the printer que and never starts, somtimes when selecting print though it respondes after a while with the error message "Printer Responce not recived"
Any ideas?