Multiple Application

[eluser]LittleNinjaCoder[/eluser]
[quote author="Aken" date="1335302341"]http://ellislab.com/codeigniter/user-guide/general/managing_apps.html[/quote]
Thanks Aken. Let me tell you what I did.

1º Rename application for applications
2º Create 2 folders inside:
/applications/backend
/applications/frontend
3º Copy those 6 folders from
/applications/
to
/applications/frontend
and
/applications/backend
(folders: config, controllers, errors, libraries, models and views)
4º Delete from
/applications/
folders: config, controllers, errors, libraries, models and views

5º Edit /index.php
... But here is the problem... I have 2 applications.. what PATH should I put in $application_folder variable?
Because /index.php is for the whole installation, right?