[Zope] siteroot problem

I'm just starting to fool with zope, and in my exploration of it, mindlessly set up a siteroot object in the root directory which redirects all requests to a child directory. Now, I am unable to access the management interface and so cannot remove the problematic object. Is there any way to fix this aside from purging/recreating the zope instance? Hints, ideas, or specific referals to TFM are welcome. -davidc