Set session_id

[eluser]Clifford James[/eluser]
Hi all,

Is it possible to retrieve session data by setting the session_id?

Code:

$this->session->userdata('session_id', $session_id);

$user = $this->session->userdata('user');

The problem is, I'm using Uploadify and when I want to access the session data in the request it isn't the same anymore (user agent has changed to Flash instead of FireFox), so I cannot access the userdata for the specific user.