Apologies: the file is called mod_perl.so. If it's not in your <apache>/modules directory (where it should be:) you'll have to manually extract it from the ppm archive (at an address something like: http://theoryx5.uwinnipeg.ca/ppmpackages/x86/mod_perl.tar.gz) and place it in the <apache>/modules directory. There are other mod_perl binaries in that location, so you may have to pick the apache version relevent to your installation (e.g. mod_perl-1.26_1.3.20.tar.gz or whatever).