The standard printing system for Linux and OS X is now CUPS, and I beleive that is was in RH 8. CUPS uses PostScript natively, so for any PostScript-compatible printer you simply need a PPD file.
The main Website for info is called Linux Printing. Also look out for the Gimp-print package, which provides additional drivers to supplement those supplied with CUPS.
Two other things:
- The RH config utility sets stuff up that the built-in CUPS Web frontend doesn't, so always create print queues through the RH utility.
- RH 8 is totally unsupported, and is too far behind the latest software to be upgraded. So you'll need to plan for replacing this system with a RHEL or CentOS installation. Which would give you a fresher driver set as well