Script to place folder of images @ 100%, one image per page?

Try this,

var doc = app.activeDocument;
var w =doc.documentPreferences.pageWidth;
var h = doc.documentPreferences.pageHeight;
doc.viewPreferences.rulerOrigin = RulerOrigin.pageOrigin;
var _folder = Folder.selectDialog("Select a folder");
var _files = _folder.getFiles();


for(var i =0;i<_files.length;i++)
{
        if(_files instanceof File)

        {
                var image = doc.pages.item(-1).place(_files);

                var gb = image[0].parent.geometricBounds;
                var imageheight = gb[2] - gb[0];
                var imagewidth = gb[3] - gb[1];
                image[0].parent.geometricBounds = [(h-imageheight)/2,(w-imagewidth)/2,(h-imageheight)/2+imageheight,(w-imagewidth)/2+imagewidth];
                image[0].parent.fit(FitOptions.CONTENT_TO_FRAME)
                doc.pages.add(LocationOptions.AT_END);
            }
    }
doc.pages.item(-1).remove();

Regards,

Chinna