None of this stuff is mine, this is Serguei Trocuhelle's PPM repository. I doubt that anyone has the entire CPAN in a ppm repository since there is a percentage of the modules which are not intended for use on a Win32 platform. Did you look at PPM::Repositories?
"PPM::Repositories - a list of all known ppm package repositories"
You should update to build 820, because 819 cannot handle zip packages.
If you don't want to for some reasons, you can just unzip this package, and move contents of blib\lib to perl\site\lib, and html to perl\html.
But I really recommend to upgrade to build 820, it has a lot of fixed PPM4 issues.