[Zope] How to upgrade to 2.3 (no differential install?)

I'm running Zope 2.2 on RH Linux 7 I see that there's no 2.2-to-2.3 .tar file.. Why? What's the correct way to upgrade my existing Zope installation? -- Call me stupid, I can't find the proper command line switch to get tar to ignore the top level directory name Zope-2.3.0-linux2-86 Do I have to untar into a junk directory, then cp -r everything to my current dir? Brad Clements, bkc@murkworks.com (315)268-1000 http://www.murkworks.com (315)268-9812 Fax netmeeting: ils://ils.murkworks.com AOL-IM: BKClements