Help with Rewrite Rules on Multisite

I have wordpress multi-site enabled and have roughly 50 sites up and running. I have been asked to make what seems to be a small change but I am unsure if its even possible.

We have a large website (not wordpress) that serves up the main site with all its content. We then have a sub-folder containing wordpress with employee blogs.

These blogs are all based on their first initial last name. This all works fine, but I have been asked to clean up the “address”.

What we have now is http://www.sitename.com/wpmu/name
What we want is http://www.sitename.com/name

I am not even sure if this is possible but there may be a larger problem
The root for our website is http://www.sitename.com
When this is typed in it redirects to http://www.sitename.com/web/index.php
so web and wpmu are in separate folders in the root directory.

Is it possible for the wordpress install to remove the wpmu in the address bar?