[Zope] Installing the Managment product for RSS Channels

Hello, I have tried to install the RSS Channels product found at: http://www.zope.org/Members/TheJester/ChannelTag I seems very useful. (I want to add Slashdot news to my portal *S*S*S*) Well .. there's only one problem. The product won't go into Zope :-( I have untared the tarball into the Products directory. When I try to restart Zope it tells me that I need a xmlsax module. Hmm .. where do I find this module ? I have tried a search on the zope.org site but found nothing. Anyone else using this product ? Regards, Gitte Wange