Andi Lutz is an ace at this splice, he made his own little splice tool out of a bent over bicycle spoke. I watched him do 4 of them in about 20 minutes total.

The first thing you do is make your loop, then pass the long end of the line through the short end using the spoke to pull it through. Then you pass the short end back and forth through the long end, maybe 3-4 times, then leave the tail up inside the long end, again, using the spoke to pull it through.

Maybe he can describe it better for you, or show a picture. He put loops on just about every peice of line to his spin pole, downhaul and spin sheets and they work great! Every place you would tie a knot, he has a loop splice. The hard part is measuring exactly where you want the loop, so the length is correct after you make the loop. But it saves you lots of knots and shackles and the spliced loop won't hang up on other lines when you are done.