If I install a Xenforo on a subfolder on my domain like mysite.com/test
Then use the Xenforo 1.2 importer to Xenforo 1.2 to import my site there.
Delete my Xenforo 1.2 from mysite.com and the old database.
Copy the new Xenforo 1.2 from mysite.com/test over to mysite.com
Wala. My site is the same, the only difference is the thread, post, conversation, profile posts and user ids?
and the fact that it hasn't transferred over old addon information (that I no longer use) from the old database?