I have looked at the Siteinteractive solution, unfortunately it does too much. I don't need a program that creates the .htaccess file and stores information, I have all that already, I need a program that can login or logout from the directory that is already protected, and then redirect appropriately to my existing account creation scripts or the homepage.

I have not seen a way to do this other than the brute force method in the browser window for logout is to try to force a bogus authentication.