Kerberized Printing in Leopard

I'm currently working on getting Kerberos to work with our windows printers on our Mac Leopard machines at my job. No success so far, but I did discover one thing. In the CUPS FAQ, this is written: 

"Note: In order to use Kerberos-authenticated shared printers, you must be running a version of MIT Kerberos with the  krb5_cc_new_unique ( ) function or Heimdal Kerberos."

I wondered what that meant. It means it needs MIT Kerberos 1.6 or higher or Heimdal Kerberos, a different program entirely. Mac Leopard ships with MIT Kerberos 1.6 so something else is creating problems.

Thanks to meantheory for making this a little easier.