To make and test, do the following: perl Makefile.PL make make test To copy the libs and docs to the right places, do this (as superuser or administrator): make install If you're using Windows, you probably have to first get nmake to make this work. If you have the ActiveState distribution, read the part about installing modules from CPAN. Then: perl Makefile.PL nmake nmake test nmake install If you don't have the Info-Zip tools zip and unzip installed, you will get warnings from "make test" or "nmake test". Don't worry about these. Actually, if you're using ActiveState's ActivePerl on Windows you should first check for up to date .PPM versions and use their PPM tool to install them. You can find an up-to-date PPM version of Compress::Zlib on my website at http://bike-nomad.com/perl