RIS and Service Pack 2

I have a RIS Server setup which works just fine. I have added the base Win2000 Pro CD image as well as my custom image (Office, Windows Updates, etc..) But it seems that as soon as I install Service Pack 2, I am greeted by a message saying I need tohave a CD based image on my server of the same version. I am almost sure this is because of SP2. Is there a way I can get around this? I’d appreciate anyone’s help with this. Thank you in advance!!