Also, for those of you who have been thinking about trying this, you can't print sections of the Guide to your printer. I had to sit with a notebook and write down all of the instructions for each of the locked room puzzles so that I could open the doors. I got 3 puzzle doors open on my own, but the rest were too complicated for me to figure out myself, so I used the guide to unlock the rest of the doors.
I also tried to print sections from the guide by scrolling down the Guide to the door puzzle I wanted to copy by pressing Control and Print Screen buttons, opening up a Word blank page, and tried to paste the image of the Guide page - but it didn't work, no matter how many times I tried. Also, highlighting a Guide page, copying it, and trying to paste it into a blank Word page doesn't work either.
So save yourselves some sweat! Do it the hard way-take notes in a notebook the way I did, and then work the door puzzles.