One thing you might try is to install the CPAN version of
PPM on your machine; to do this, download the
PPM-2.1.8.tar.gz source, extract the files, change into the unpacked directory, and run
perl Makefile.PL
nmake
nmake install
For this, you'll need to install
nmake for Windows. After this, you can install
XML-LibXML from the
uwinnipeg 5.6 repository by issuing the command
ppm install http://theoryx5.uwinnipeg.ca/ppmpackages/XML-LibXML.ppd
This should also install the prerequisite ppm packages,
as well as the required
libxml2.dll library (which goes somewhere in your
PATH).