Kerberised printing from OS X to AD print queues 10.5.4

Hello, I am hoping someone can help me. I have been trying to do this now for quite a while. I have looked at KprintD (apple-scripts.com) and configured the print queue to print to the AD print using the ksmb:// protocol but it still asks for authentication. I have tried to configure cups on OS X to print to the AD queue using the windows printer on SAMBA option but it stil asks for authentication. I have even tried to build a Linux Server to do the authentication but again it still asks for authentication when printing from the OS X clients. What can i do to to print to the queue with out getting requested for authentication. I need to be able to print to the queue on the AD so i can manage the printing as this is a Primary School setup and the kids can print a fair amount of stuff :-) Hope someone can help.....Please?