[Zope] SiteSummary

To all Respected readers, This mail is to query about a very useful product, namely SiteSummary. Its gets untar into a file 'SiteSumaary ' without the 'Zexp' extension. The Installation instructions says that you have to import the file in Zope. Zope gives an error that it has an invalid export header. I have tried to rename the file with the zexp extension but the error has remained the same. I have already been using the feedback form on the sitesummary page, but havent received any replies. If anybody can help me on this issue, I would be very grateful. -Thanks.