First, get some lobster. Then park them in the fridge or freezer for a bit so they chill out and go to sleep.
If you decide you want to boil, then check out this instructable.
Step 1: The Steamer
Pick your stones, wash your stones, carefully line the pot with them, fill with water to just a 1/2 inch below the tallest stones, and fire it up on the stovetop.
Step 2: Steam Bath
Now get crackin'!