Installing 2nd forum based on old
 

I'm thinking of starting a new forum, on a completely different subject than my existing one. I've done a lot of work (although you wouldn't know if from looking at it) tweaking the settings and design, and I'd like to carry those settings and design to my new site.
I'd be buying a new license and everything, but I don't want to have to figure out all the settings changes and mods and things I did that got my old site working the way I like it, I just want to "carry over" all of that to my new site.

Ideally, I'd like to just "copy" over all the files to the new site, change the mySQL info, close the forum and start from there to modify that new forum to look the way I want it, change the titles, forums, etc.

How can I do this?

to clarify:
2 forums, one has been around for a while and is setup the way I like it, the other is brand-new. I want my brand-new one to start off exactly as my old one is right now, and then I'll make changes to the new one for new forums, delete all the old content, etc.

Help?