I guess I am misunderstanding, but on our lowly HP LaserJet 5N with a
10baseT network connection, I just use a remote-printer-name of "text"
for the plain-text queue and "raw" for my postscript queue.

lp|local line printer:\
	:mx#0:\
	:rp=text:\
	:rm=hplj5n:\
	:lp=/dev/null:\
	:sd=/var/spool/lpd:\
	:lf=/var/log/lpd-errs:

ps|local PS printer:\
	:mx#0:\
	:rp=raw:\
	:rm=hplj5n:\
	:lp=/dev/null:\
	:sd=/var/spool/lpd:\
	:lf=/var/log/lpd-errs: