Don't know why you can't turn the rotors at least once. I don't like to though. Rotors are cheap, and easy to install. Good chance to upgrade a little too. Turning them too much will cause you to lock up, or in our case continually dump the ABS.
I did a search today looking for service manuals for the GTI, but they stop at 2005 (MKIV). I needed one anyway, but was going to scan and send you guys the pages you need.
My advice... Find any of your handy frineds to walk you through it for a few bucks or a few beers. Once you have done it, its like someone else said, they are all pretty much the same. There are some tools you will need though, and the cost of the first time, may approach what the dealer wanted. Need the pads of course, and don't get the cheap ones. Good breaker bar, 3 ton floor jack (yes you could use less, but my motto is bigger is better), 6 - 8 " C clamp, 1/4" clear hose, jack stands and misc. other crap. But, even with a friend that knows what he is doing, ONLY DO ONE SIDE AT A TIME! You may need to go back to see how the damn thing goes back together (happens more than you would think).
Where are you guys at?