[Zope] small (newbie?) problem using the binary upgrade to 2.5.1

Hello, I tried to use the Zope-2.5.x-to-2.5.1-win32-x86.tgz binary upgrade (from 2.5.0) I extracted the archive with Winzip, but this retrieved one huge python-like sourcefile without extension During the extraction i used "use folder names" to put the files in the correct places, but it doesn't seem to work out. What should i do with the huge sourcefile? Hans de Wit Stichting Farmaceutische Kengetallen Postbus 30460 2500 GL DEN HAAG Tel. 070-3737448 Fax 070-3737445