ImgBurn will never convert files like that, it's not something I have any interest in!
I'm sure DVDFlick or ConvertXtoDVD would do the trick if you want to turn it into a DVD Video disc.
That said, I'm not sure the OP want's to convert anything, just to burn the big file 'as-is' to a disc. If that's the case, yes ImgBurn will work fine. Just ensure the file system is set to 'UDF' in Build mode.
Any problems beyond that are down to drive/media issues.