OS X, HP LaserJet 5 printer driver not installed

Hello,

I just started using Mac OS X today.  Have 2 computers with 10.5 Leopard and 1 with 10.2 Jaguar.  I think all 3 computers are Power Mac G5's.

I have an HP LaserJet 5 printer.  I'm not very familiar with parallel printer ports and cables. And it seems G5's don't have parallel printer ports so I couldn't connect using the parallel printer cable that came with the printer.  The G5 has an rj-45, firewire, and usb ports.  So, I used a cable to convert the parallel port into a USB port.  The cable I used is an ATEN UC-1284B Printer Cable.  It's properties are:
- Product ID : 8198 ($2006) |
- Vendor : ATEN UC-1284B |
- Device Speed : Full |
- Power (mA) : 500

Leopard can print to the printer through the USB port and cable.  From what I could get from OS X the printer properties are:
- HP LaserJet 5
- Gutenprint V5.1.3
- PPD File Version 5.1.3

Jaguar can't print to the LaserJet 5.  In Jaguar I looked at the Printer control center or whatever the printer control center in OS X is called and it sees the LaserJet 5.  But, it has a question mark on the name and says "Driver not installed".

Well, after googling I think I found that Jaguar supports the LaserJet 5 out of the box.  So, I'm stumped. If it's suppose to support the printer natively why doesn't it just work?  Please help.  Thanks!