if you can find the book The New Marine Aqarium it has several ways to put your lr.
island formation - a loosely assembled mound in the center of the tank with space around it
atoll formation - kind of a horse shoe shape mound with space around the outside of the tank
single peak - a high mound in one corner of the tank sloping down to the other end of the tank
2 peaks - a mound in one corner of the tank with another mound in the opposite corner looks like a vally running thru it
also using pvc pipe underneath or thru the rock
aquascaping _________
karla

75 gall, 80 lbs sand, 110 lb lr, 10k pcs, atinics, emperor 400, prizm skimmer, hagen and maxi jet powerheads