how do i make a dvd file from an iso ,so that i can burn and play on x box 360
If you don't already have the software to do it.Try ImgBurn.Whilst free. It is that good you should feel obliged to donate.http://www.imgburn.com/See their guides.http://forum.imgburn.com/index.php?showforum=4
If you have an .iso and .dvd file you just burn it to a dvd+r dl by loading the .dvd file into imgburn.
Your 360 has it been flashed ?. You haven't really explained what you have tried.