The actress is due to stay in the Betty Ford Clinic until January 3. Film director Matthew Wilder said the 24-year-old is trying to get a 'work pass' so that she can fly to LA and be involved with the planning stages.
He told RadarOnline.com, "Lindsay is happy and I have been sending her some films starring several actors that we would like to cast alongside her in our movie.
"She just received them so we are still waiting for her feedback but we really want her to be part of the whole experience even though she is not physically here in Los Angeles.
"Lindsay told me that she is working to get a work pass so that she can get out and meet us to discuss the project. Obviously, she would probably need some kind of monitor and I think that she feels cooped up sometimes which is understandable. "
He added that the troubled star 'seems to be doing well' and is still 'excited about Inferno'.
Lohan has not made a big screen appearance since 2007's psychological thriller I Know Who Killed Me.