I have a WordPress site at mydomain.com
I am attempting to create a new version with things like Buddypress integrated. In order to get it working fully before I put it on the live site, I want to copy my wordpress installation into mydomain.com/new then I can change everything I want and leave the live site unchanged. Then once I'm finished I'll delete the live site and move move the installation in /new to the root directory.
Which part of the "moving WordPress" guide would I follow in order to do this? There are a bunch of different things there but I'm not sure what is best suited for me, I don't want to touch my original WordPress installation, just copy it.
Thanks for your help.