Access Codeigniter functions from external script

[eluser]drkameleon[/eluser]
Hi guys! I'm new to CI, so this question may sound silly, but anyway...

So, here's my situation :

- I have a complete app set up with CodeIgniter.
- I'm initiating a background task, running a PHP script.

My question :

- How could I use CodeIgniter function/object (e.g.

Code:

$this->db

or

Code:

$CI->db

- doesn't matter) from that external PHP script?

Basically, what I mainly want to do now is access the db.

----

Idea : Could a workaround, like include 'index.php'; at the top of the script do the trick?