Burning DVD Movies

How can I burn 2hour 40 min Movie?

You can use a dual layer disk, DVD DL. No loss of quality.
You can use DVDShrink to fit it on a single layer disk, SL, with some loss of quality.
You can use DVD Rebuilder, http://dvd-rb.dvd2go.org/, to fit it on a SL disk, also wiith some loss of quality