How do I burn a .img to DVD?

Hi,

I created a .img from iDVD. I tried to burn the .img straight to DVD from Finder, but all I got was a DVD with the .img file on it. I thought that burning the .img would actually create the DVD image (like burning a .iso image).

If I mount the .img in my MacBook then I can see the Video and Audio folders, so the img has the correct data.

How do I use the .img to create a DVD?

Thanks