I'm sure it could very well be easier with a couple of people, but I can also see how two people could mess up just as easily, if not moreso :) I only messed up the first piece before coming up with this method, and then everything onward was flawless.
So here's what I did. I took each of my rolls and rolled them in the opposite direction on some wrapping paper tubes while I cleaned the windows. This is suggested in the instructions and seemed to work well. I put the re-rolled film outside in the heat while I did the prep work of cleaning windows, and that seemed to help. If it is Winter I guess you can just leave them inside for longer, just re-roll them ahead of time. As I was ready to use the film, I just layed it out flat on the floor to measure and cut to size.
Cut a piece to size as recommended by the instructions. Lay the cut film on a large table clear side up. A long folding table that you can adhere tape to works well. Also, you might have to pull a corner of the film apart to figure out which side of the film is in fact the clear side. Get four (or more) pieces of tape ready (Scotch tape works) each up to about an inch long. I didn't bother spraying the film with solution before this point, because that can intefere with the adhesion of the tape about to be applied. Plus it is Summer and humid here. I'm not sure if you can get away with not spraying in the Winter.
Now that you have the film on the table (clear side up!)and tape at the ready, start pulling the clear side off and down from one corner. Yes, getting the corner started can be difficult. All I can say is be patient and persistent. Once you have a couple of inches of the adhesive surface exposed, tape the exposed corner down to the table. Keep pulling to expose the remainder of one side, applying tape as you go until you have it tacked down to the table all the way across.
Now you can very easily (and most importantly, by yourself!) pull both corners of the clear sheet down towards the opposite side of the film. You do not have to have anyone there to help you and you do not have to spray the adhesive side as you pull the clear film off as they say in the instructions. Be careful as you approach the end not to curl the the film. Once you have the clear part pulled off, it will try to cling to you from the static--just toss it aside. If you re-rolled the film earlier, it should lay relatively flat.
Now liberally spray the adhesive side of the (still taped down) film, spray the window, and then spray everything all over again. The instructions are right--wetter is better. Grab two corners of the film and pick it up, gently releasing the tape from the table (don't worry about the tape still being attached to the film, you just trim it off later). Get the film in the general area of where it needs to be and watch the adhesive side get magically sucked down onto the glass! It will move around easily, so move it as necessary to align the one side with the factory edge of the film.
I found that trimming the edges to a little less than an inch of the final trim seems to help with the final trim job. Once the film is on the glass, the rest is cake. Just follow the instructions to squeegee it down and trim. Wetting down the film prior to squeegeeing and also prior to trimming is critical.
Run out of solution? Add a few drops of baby shampoo (or even a drop or two of dish washing liquid) to some water and refill the spray bottle. Avoid ammonia products. It isn't as viscous as their product, but it's cheap and you don't feel guilty about being liberal :)
And now for my soapbox rant :) This will help reduce your carbon footprint! Reduce our need for more coal and additional nuclear power plants! There, I said it, and I feel better :)