Yep. What the other guys have said.
Also, it's been posted many times before and no doubt will be posted many times more, but this is pretty much the best drift align sim you can find:
http://www.petesastrophotography.com...uidingsim.html
Dead easy, and very realistic to what you'll see when you're out at the (crosshair) eyepiece
People can explain the process over and over again, but there's nothing like actually "doing" it, to understand how it all works