I have been digging around inside hex editors etc trying to find how the Roxio software sets it's API urls, eventually I was lead to the Registry.
You will need to have the actual Capture program running, not the launcher but the capture window, the one that shows the preview of your game.
With this open, you will need to open Windows Registry
You can do this by going Start -> Run -> and type: "regedit", press enter
You will need to look for this folder: HKEY_CURRENT_USER\Software\Roxio\Game1X\MediaImport\AVCapture\Config
Inside here are some variables that we will need to modify while the program is running, they are;
Double click "LocationUrl" and set it to one of the URLs from this page - http://bashtech.net/twitch/ingest.php, make sure it's a twitch.tv URL not justin.tv
Press OK and double click on "StreamKey"
Go to http://www.twitch.tv...board/streamkey and copy your stream key, pasting it in to the "StreamKey" variable and press OK.
Because you've set a stream key and location directly in to the registry you will not need to log in to Twitch using the options window, this thing is kind of null and void since all Twitch actually needs for you to stream to it is a stream key.
Now, go to the capture Window and press the "LIVE STREAM" button, this should now start streaming to twitch.
PLEASE NOTE: THE PROGRAM OVERWRITES THESE REGISTRY VALUES EACH TIME IT IS OPENED, YOU WILL NEED TO MODIFY THEM EVERY TIME YOU WANT TO STREAM