I have a similar problem. I have two sites installed on the same host.
The old site is www.garbplus.com
The new ZC site is www.garbplus.com/zc

I am ready to go live with the new site, but I dont know how to configure it so I can delete the old site (or set up a redirect page only) and drop the "zc" from the new site. I hope this makes sense. Someone please help!

Thanks

Wendy