USB only printer needs to run on parallel print server

can it be done? I'm trying to help out my girlfriends dad - they just bought a D-Link router, and it comes with a parallel port to act as a print server. They have a USB only printer/fax/scanner combo. The computer is very old, and at the moment doesn't have USB. Is the only option I have connecting it to the computer via a USB card (if i can get one into the computer - I'm not sure about the expansion slots on it yet), or is there a cable I can use that will allow a parallel port print server to work with a USB only printer device. Thank you for any help!