gistfile1.txt

// application/Bootstrap.php
// note: If you want to have the module autoloader running on the default module, you'll need to add this to your application bootstrap. Boo...
class Bootstrap extends Zend_Application_Bootstrap_Bootstrap
{
    protected function _initDefaultModuleAutoloader()
    {
        $autoloader = new Zend_Application_Module_Autoloader(array(
            'namespace' => 'Default',
            'basePath' => APPLICATION_PATH . '/modules/default/',
        ));
    }
}

// application/configs/application.ini
[production]

resources.frontController.moduleDirectory = APPLICATION_PATH "/modules"

; This gets Zend_Application_Resource_Modules to instantiate!
resources.modules[] =

// application/modules/admin/Bootstrap.php
<?php
class Admin_Bootstrap extends Zend_Application_Module_Bootstrap
{
}