Well, at the end it was quite easy:
- Download de source code (all of it) and (to simplify) copy the folders at the same place where's your FLA file (so the "de", "bin", "snd" and other folders are at the same level than your FLA file).
- Create a movie clip, open it and put these lines at the first frame:
import de.mightypirates.megazine.MegaZine;
var mz:MegaZine = new MegaZine("your_xml_file.xml","bin/interface.swf");
addChild(mz);
That should work... In fact you don't need to use a movie clip container, but in my case I want to add other buttons together with the book, so it was more convenient for me.
Hope it helps...