So did the research on "experiments" in GA which looks nice...but basically it uses separate pages for everything which I do not want to do.
I would love to do this locally with PHP and sessions.
So the script assigns the user to group A or group B randomly and sets this in a session.
Group A say gets a red background and group B gets a green background.
I then test all sorts of GA metrics (like normal) but compare group A or group B.
Is this possible?