Still problems with pbm programs

Im trying to convert some files from Harvard Graphics (Harvard Graphics is on a dos machine) over to raster images so I can print them on my Tektronix 4696
printer. Im trying to use the tifftopnm program in /grass/4.1/pbmplus/pbm
directory, the I want to use pnmtorast, but I cannot figure out how to properly
use the commands, please help if you know anything about these commands :

anytopnm pbmmask pbmtoxbm picttoppm pnmtile ppmtouil
brushtopbm pbmpaste pbmtoybm pnmarith pnmtorast ppmtoxpm
cmuwmtopbm pbmreduce pbmtozinc pnmcat pnmtotiff psidtopgm
damage.tif pbmtext pbmupc pnmconvol pnmtoxwd qrttoppm
fitstopgm pbmto10x pcxtoppm pnmcrop ppmhist rasttopnm
fstopgm pbmtoascii pgmbentley pnmcut ppmmake rawtopgm
g3topbm pbmtobbnbg pgmedge pnmdepth ppmpat rawtoppm
gemtopbm pbmtocmuwm pgmenhance pnmenlarge ppmquant rgb3toppm
giftoppm pbmtoepson pgmhist pnmfile ppmquantall spctoppm
gouldtoppm pbmtog3 pgmnorm pnmflip ppmrelief sputoppm
hipstopgm pbmtogem pgmoil pnmgamma ppmtogif tgatoppm
icontopbm pbmtogo pgmramp pnmindex ppmtoicr tifftopnm
ilbmtoppm pbmtoicon pgmtofits pnminvert ppmtoilbm xbmtopbm
imgtoppm pbmtolj pgmtofs pnmmargin ppmtopcx ximtoppm
lispmtopgm pbmtomacp pgmtolispm pnmnoraw ppmtopgm xpmtoppm
macptopbm pbmtomgr pgmtopbm pnmpaste ppmtopi1 xwdtopnm
mgrtopbm pbmtopi3 pgmtoppm pnmrotate ppmtopict ybmtopbm
mtvtoppm pbmtoplot pgmtops pnmscale ppmtops
pbmlife pbmtoptx pi1toppm pnmshear ppmtopuzz
pbmmake pbmtox10bm pi3topbm pnmsmooth ppmtorgb3

                       Thanks Bob Atnip
                       robert%atterbury@cerl.cecer.army.mil
                       (812) 526-1249