Running Multiple Applications with one CodeIgniter Installation

[eluser]khuzaimi[/eluser]
system/application/foo/
system/application/foo/config/
system/application/foo/controllers/
system/application/foo/errors/
system/application/foo/libraries/
system/application/foo/models/
system/application/foo/views/
system/application/bar/
system/application/bar/config/
system/application/bar/controllers/
system/application/bar/errors/
system/application/bar/libraries/
system/application/bar/models/
system/application/bar/views/

that mean each application like foo and bar have foo.php and bar.php at the same level system/

it is possible to have index.php for foo and bar application