.IMG is a native imageformat of the fantastic freeware tool DvdDecrypter......maybe some of us don't know,but this great program can actually BURN too...
DvdDecrypter-->mode-->iso-->write......and select the .IMG image....
ehm i have another question about .img extension: i don't have a dvd burner and you were talking about dvd but can i burn a .img ( or i rename it to iso) on a normal cd-r cd??