I can think of two possible solutions.
First one is to set up an ad hoc local server like XAMPP. Deploying it takes few minutes and you don't have to install anything. When you don't need it anymore, you just delete the folder and you're done. Files served through XAMPP will have online privileges, but you won't have to actually be online.
The second solution is to use Flash Player Projector (you can get it here). It's meant to run Flash files locally, maybe it will ignore security settings - worth giving it a try.