WordPress MU

I was thinking of running WPMU in root, and joomla in a folder. And then redirecting or including joomlas index.php file.

Can I do that, or is the index.php needed for WPMU?

What's the point of that and how exactly would including joomlas index.php file be a proper integration? They can't just be forced together like ingredients. The index.php file is basically the starting point for Wordpress initialization, look inside the file it's very short.

It dosnt have to be integrated.

The point is having WPMU setting up user.domain.no urls for the registering users.

Also that the joomla site is beeing loaded when people push inn domain.no instead of the blog frontpage.

I'm going to load the info i need from the WPMU database into joomla frontpage. It's ok to be two sepperate logins.