What you are describing is basically Off Shoulder casting. You simply cant your rod about 45 degrees to the left (for righties) which now has the rod across your chest and cast off the other shoulder. It takes some practice to get it down -- try to maintain the straight line path of the rod tip during your casting stroke, increase the line speed (lengthen the stoke, drift on the back cast, double haul), keep the stoke smooth, accelerate to an abrupt stop and do not over power. Let the rod do the work.
My suggestion would be to keep your loops as tight as possible for smooth presentations and accuracy. A slightly opened loop with heavy flies is not always bad, but a tight loop keeps the wind from totally dominating the cast.
Apart from this type of cast, using your left hand (not as hard as one might think) or some complex trick casts, not many other options to deal with a left to right wind. But, how often have you fished in saltwater without some level of wind to deal with.
Good luck.
Steve O.
_________________

"Anything worth doing well is worth doing badly at first"
Fly Fishing Addict!!
FFFCCI