Just to put some things right.When you lose an engine lets say at 1000ft on final the recommended boeing procedure is to increse VAPP by 20kts and select Flaps15. This done only if you know rwy length is sufficient ofcourse. I had this conversation with a few people and everyone has their own opinion.What i would do if i had an engine fire that wouldnt go out and i had to land on a short rwy then i would go at least with flaps30. Reason for this is because in such a case go around for me is not an option since the wing is on fire.