ページ数が多いデータをトンボ付きで効率よく印刷する方法

(function (){
var bleed = false;
var tgt = app.activeDocument;
var f = File.openDialog("select PDF file");
var pNum = 1;
var bnds1 = [0,0, 303,216];
var bnds2 = [0,216,303,432];

var pg = app.activeWindow.activePage;
var rect;
for(var i=1;;i++){
try{
app.pdfPlacePreferences.pageNumber = i;
app.pdfPlacePreferences.pdfCrop = PDFCrop.CROP_MEDIA;
rect = pg.rectangles.add();
rect.strokeColor = tgt.swatches.item(0);
rect.fillColor = tgt.swatches.item(0);
rect.geometricBounds = bnds1; //document size
rect.place(f);
rect.fit(FitOptions.CENTER_CONTENT);
app.pdfPlacePreferences.pageNumber = i;
app.pdfPlacePreferences.pdfCrop = PDFCrop.CROP_MEDIA;
rect = pg.rectangles.add();
rect.strokeColor = tgt.swatches.item(0);
rect.fillColor = tgt.swatches.item(0);
rect.geometricBounds = bnds2; //document size
rect.place(f);
rect.fit(FitOptions.CENTER_CONTENT);
if(i>1&&rect.graphics[0].itemLink.parent.pdfAttributes.pageNumber==1) {
rect.remove();
break;
}
pg = tgt.pages.add();
}catch(e){};
}
}
)();