Though I did decide to have someone lay down the Protostar for me, when I was working with it on my own, the only thing I ended up putting on my "must do" list was to make sure I laid it straight so that I had even amounts to fold over the backside on the top and bottom.
Assuming you are right handed, you can lay out the full length of the material (with the adhesive backing paper cover still on) down the panel and then get your right hand on the underside, removing the backing as you go with the right hand, and smooth it flat with the left hand. I wouldn't suggest peeling a long section off and trying to lay it down, but peel it in small sections as you go, which keeps your hands as close together as possible. It gets a little akward if you peel a long section off and your right arm is down yonder while you're trying to smooth with your left. Also, trying to pull up a couple of inches if need be would be a lot easier than a longer section.
As well, you might consider something in your left hand to smooth as you lay as opposed to just your hand. Most importantly, take some of the material and work with it on a mock-up before going for it on the final panels. That will give you a good feel for it.