Display thumbnail of PSD on ScriptUI dialog

Yes here is an example, BUT it will not work with Photoshop CS5 (Yet another bug!) works with Photoshop CS3 and CS4

It will work with Bridge and Illustrator CS5 though.

function main(){
inputFolder = Folder.selectDialog("Please select the folder with Files to process");
var fileList = inputFolder.getFiles(/\.(jpg|png)$/i);
Image.prototype.onDraw = function(){ // written by Marc Autret
// "this" is the container; "this.image" is the graphic
if( !this.image ) return;
var WH = this.size,
wh = this.image.size,
k = Math.min(WH[0]/wh[0], WH[1]/wh[1]),xy;
// Resize proportionally:
wh = [k*wh[0],k*wh[1]];
// Center:
xy = [ (WH[0]-wh[0])/2, (WH[1]-wh[1])/2 ];
this.graphics.drawImage(this.image,xy[0],xy[1],wh[0],wh[1]);
WH = wh = xy = null;
}
var win = new Window ("dialog", "Image test");
win.pnl1 = win.add('panel', undefined, undefined, {borderStyle:'black'});
win.pnl1.preferredSize=[200,200];
win.Im1 = win.pnl1.add ("image", undefined,fileList[0]);
win.Im1.size = [180,180];
win.pnl2 = win.add('panel', undefined, undefined, {borderStyle:'black'});
win.pnl2.bu1 = win.pnl2.add('button',undefined,'Next');
win.pnl2.bu2 = win.pnl2.add('button',undefined,'Previous');
win.grp100 = win.add('group');
win.grp100.bu1 = win.grp100.add('button',undefined,'Cancel');
var PIC = 0;
win.pnl2.bu1.onClick=function(){
//Next picture
if(PIC == fileList.length -1) return;
PIC++;
win.Im1.image = fileList[PIC];
    }
win.pnl2.bu2.onClick=function(){
//Previous
if(PIC == 0 ) return;
PIC--;
win.Im1.image = fileList[PIC];
    }
win.show();
}
main();