You need to use slackware 10.1 packages,I use to use swaret;
Do you have this installed;
PACKAGE NAME: a2ps-4.13b-i386-2.tgz
PACKAGE LOCATION: ./slackware/ap
PACKAGE SIZE (compressed): 859 K
PACKAGE SIZE (uncompressed): 3140 K
a2ps: a2ps (any to PostScript filter)
a2ps: GNU a2ps is an Any to PostScript filter. Of course it processes
a2ps: plain text files, but also pretty prints quite a few popular
a2ps: programming languages. Also contained in this package is psutils, a
a2ps: collection of programs for manipulating PostScript files.
a2ps: a2ps is used by Apsfilter, so be sure to install this package if you
a2ps: plan to do any printing.