Being that I make all of my own doors, I had no intention of telling you to buy them.
As far as specifics, Tezzer (or any of the Ausies here) can probably give you far more tips than I can. Are the backs of the doors flat? If so, index off the back and you don't have to be worried about the curve. I know most of what I've read says to index off the front, or show side. However, as long as all of your thicknesses are the same, It doesn't make any difference. Just remeber to hold the machine firmly in place and you'll be fine. One of the things about the Domino that makes it so nice to use is that the learning curve isn't very steep. Spend a few minutes fooling around with it in scrap, and you'll figure it all out pretty quickly. Its very straight forward.