[Zope] Moving Zope Installation

Hi, I guess I have some problems after moving moving my Installation of Zope 2.0.1. I unpacked Zope to /usr/src and got it up and running. Messed around a bit etc. Now I would like to have it at /usr/local. I copied the directory and run 'cd /usr/local/Zop; python w_pcgi.py' again. This worked fine. Zope starts from this location and all the things I set up are still there. But sometimes I get errors about missing files, where the files are searched in the old, no longer existing, location. Most notably when there is a problem with the lock-file, for example if Zope is already running. Is this a severe problem? Can I do anything about this? Is there something like a 'make clean' that would take care? Regards Jochen