Sorry I thing I explained it not correctly actually it would be this:
/root (index.php)/system1 (index.php)
images
themes
/root (index2.php)/system2 (index2.php)
images2
themes2
Right now I did some testing this way
/root/system1
/root/ee/system2
Of course that is no problem, they don’t share the root.
I downloaded BUENO theme to do some testing. I made a fresh EE instalation with BUENO, then I went to the current database of my working installation and using phpmyadmin I exported all of the exp_forum* + exp_member* tables at once in a file and imported them on the new site.
I followed this video tutorial for the exporting process and then I just imported the created file in the new EE database:
http://www.myownserver.info/home/step-4-additonal-settings/76-managemysqlphpmyadmin.html
Everything seems to work perfectly well even being different builds the current one 20091211 and the new one on 20100121 build
So have to do some more testing but it seems possible at least in my case, where I only use the forum module right now.
So what I’ll is to just another installation with Cafe Break Theme learn how the settings on this framework works and when I’m ready, I’ll Set the current site offline and install the new one… on the root.. shouldn’t take more than a couple of hours.