Over on digg recently I also saw a tutorial for creating a fake software box using Photoshop. I don't use Photoshop, but I do use Paint.NET. So I decided to try the same thing using that tool, which is one of my favorite free tools.
There are a few features different from Photoshop, so it wasn't 100% trivial to do, but I did manage to emulate it pretty well. I may write a similar tutorial for Paint.NET users to follow. Take a look: