Hi

We are running drupal on an apache server alongside another php/mysql based open source application called TUTOS (http://www.tutos.org). We would like to have a single login across both applications. When I say that I mean that when someone logs in, he is logged in to both systems.

I am able to make my own modifications to the php code and mysql databases. However I'm not really sure at which levels I need to fuse the systems. How would I unify the user data? Is it possible to have a session running across the two applications?

cheers
Tim