Refactoring a Zend_Auth implementation

[BluAzn]

I am working on an existing project that has two areas that can be logged into. An admin section and the front end. Currently the admin section has a login action and the front end has its own login action. Admin logs in using a database table specifically for admin accounts, the front end is logged in using a different table all together.If the admin is logged in and tries to then log into the front end they are prompted to log in as a front end user (needed because front end users get completely different content based on projects they are associated with and admin is not associated with one particular project).Once logged in as a front end user, their admin credentials are gone and they have to log in again if they try to reenter the admin section.I want to make it so that the admin can be logged into the admin section AND log in as a specific front end user. Thus being able to switch back and forth between the two sections of the site without have to re-login.What is the best way to handle this within the Zend Framework?So far I am thinking of losing the separate login actions and having just one (there is no need for two, correct?) and then I have to deal with allowing separate credentials. Currently, logging in as a front end user results in the admin user having to log back in to access the admin area. Is this because some $_SESSION credential is being overwritten? Do I need to somehow create a custom $_SESSION variable to handle this the ZF way?Obviously I can't just directly assign a value to $_SESSION['front_end'] or $_SESSION['admin'] (which I would have done back in the day) so how would I do this within Zend Framework?Thanks!