If you just want to burn a data file Burn4Free does dvds. I think there is something you can do to burn4free to make it burn Itunes stuff but I'm not sure what exactly.

I know burn4free does ISOs flawlessly so if you find an Itunes format to ISO converter I think you would be set.

search for burn4free on Download.com and do NOT install the additional software it tells you to download. Its a scammy way for the company to try and get you to buy extra garbageware.