How to integrate upload file with my form

[eluser]cybersven[/eluser]
So if I understand do_upload() is a specific function from CI.
Here is the file
https://docs.google.com/file/d/0B4WpmjlD...sp=sharing
the googledoc has broken the code :/

I've added

Code:

'image_path' => $this->upload->do_upload(),

but I don't see how can I check the function with '$this->form_validation->set_rules' , actually the form is OK and in the database I got a 0 in the image_path...