How to Restore a session (DB_Session) with a session_id?

[eluser]Unknown[/eluser]
Hi Folks,

I am trying to figure out how to restore a session using session_id. For the greater purpose of passing session information from a http to a https page. I am using
DB_SESSION.

Heres what I have so far:

The HTTP From Object:

$session_id=$this->session->userdata['session_id'];
redirect($this->config->item('Base_SSL').'/check_it/'.$session_id);

The Receiving Object

So now I have the session_id in the object

$session_id = $this->uri->segment(2);
NOW how do i restore the session with the session id???