Funny thing, I'm in the middle of a battle to do the same thing for a series of systems I support. I'll start another thread covering it.
In the meantime, rlpconf is a configuration aid for printers on other 'nix boxes, not for network printers, and not what is needed in this case.
I suspect that SAMBA will be the solution, but I'm having a rough time getting a late version.
Ed Fair
Give the wrong symptoms, get the wrong solutions.