Jaglavek
If you create a contents SWF you should be able to access all the IMegaZine methods. So I would imagine this code (untested) would do the job - assuming one button instance imaginatively called btn.
import de.mightypirates.megazine.interfaces.IMegaZine;
import de.mightypirates.megazine.interfaces.IPage;
var Mz:IMegaZine;
var Page:IPage;
function megazineSetup(mz:IMegaZine, page:IPage, even:Boolean):void{
Mz = mz;
Page=page;
}
btn.addEventListener(MouseEvent.CLICK,ButtonPress);
function ButtonPress(evt:MouseEvent)
{
Mz.gotoPage(pageNum,instant); // pageNum is a uint zero based,
instant, if true, navigates direct to the page (I think)
}