Nothing is going to beat Photoshop for this, especially when you are playing around with perspective transformations. It would be even better to start off with making vector art in Illustrator and then exporting to Photoshop. – paradroidMay 19 '11 at 1:04
I did it with Photoshop. Wasn't too hard. The only part I didn't like was that when you copy the dmg-copy to the clipboard the transparency data is lost, so I had to cut it myself and re-apply the shadow. – HedgeMay 19 '11 at 15:47