Cloning over the main site --> buddypress on secondary blog

Okay. This one may be a doozy.

So, I installed Buddypress on a SECONDARY blog and have a members list and everything. (http://www.mythica.intothemythica.com)

Also, I have a third-party chat program that has code that relates to that site. However, I'm pretty sure it's code relates more primally to the main site; 'intothemythica.com'.

I did it in the beginning, before I realized how integral Buddypress was to the system.

Now I want to *clone* the Buddypress site (mythica.intothemythica.com) and overwrite the main site (intothemythica.com); then set the Buddypress to function on that main site.

That way, when beings go to 'intothemythica.com' they go to the buddypress site, and everything resolves from there.

I fear code-tangles. What is best practice to do this?