Dennis' method is the best way to do it, I think his method is the rocking twisting that I described too (at least as I'm picturing it, it seems to be the same - except we used two people for the first few turns) I used planks because my wall was well over 400 lbs (and about 100 linear feet?!?!?) and that weight needed to be distributed so it would not dig it's own hole. I had allready placed the sand in my center area where I was unrolling the wall. if your wall is 2 piece on a 30 or so foot pool, it will be about half the weight for each section and MUCH more manageable.
I really thought that the 400+ lb one piece wall was about the stupidest idea ever, why could the manufacturer not provide you two pieces, identical lengths and identical seams? It just didn't make sense, but then it WAS manufactured in a certain part of Canada that wants to be it's own country.....
Keep the wall on the inside of your pool, read the instructions well, because the start/end of your wall may well indicate where the skimmer and return will be located.