I installed the hplip package and when I do lpinfo it lists the correct lsb file for the printer I have:
lsb/usr/HP/hp-laserjet_m604_m605_m606-ps.ppd.gz HP Laserjet M604 M605 M606 Postscript
but there was no 'drv' reference below it. My understanding is that when I add the printer I need to give a driver reference using the drv: file. Do I need to unpack the lsb gz file somehow?