How to pass session variables via the URL in CF10?

Hi

I have a client with some old Flash functionality (AS2). The SWF allows the user to upload an image. However a new session is being started when the upload script is called. I have added the CFID, CFTOKEN and JSESSIONID to the URL as I did in the past to maintain the session but I believe you cannot do this anymore with CF10, if this is correct can anyone point me in the right direction of how I would accomplish maintaining the session for the upload?

This has a note about CF 10 - http://forums.adobe.com/thread/1178420

Kind regards

Shaun