I'm so sorry about your nightmares. Night terrors come during non-REM sleep (but some dreaming can occur during non-REM sleep also).

You have to have REM sleep and it happens multiple times a night, for multiple periods of time, especially in the early morning; I doubt you could control all REM sleep but sleep deprivation (what you would probably end up with trying to "control" your sleep) is not something I would mess with.

http://emedicine.medscape.com/article/1188226-overview

http://www.sciencedaily.com/releases...0201085713.htm

I would work in therapy on the post traumatic stress. People dream multiple times a night, they just don't remember their dreams; I'd work on "training" myself to either deal with the dreams or not remember them. It has been my experience that dealing with the dreams in therapy can lessen the "need" for remembering them.

http://content.karger.com/ProdukteDB....asp?Doi=96362