I know this is a bit late but I make petite lobster tails by either steaming or grilling. Friends make them in the microwave and rave about them always coming out perfect (I do not know the instructions though). To grill them you must first use kitchen shears to cut off the bottom shell and then score the meat lengthwise to prevent curling on the grill. Grill top shell down and baste then flip. I baste them with a mix of butter, worchestershire, S&P. They come out very well and you can monitor them for doneness easier to avoid over cooking.