Well, I first saw the piano cover (also posted in this thread), and I first tabbed down the song for guitar, then I just threw everything together in a program called Reaper. I used a couple of VST plugins, such as the drums and bass, which means they are programmed midi tracks. So the drums and bass is all synthesized, however the guitar play is all done by me, the track is meant to be played on 2 or 3 guitars, so there's about 3 tracks of guitar. In the background you might also hear piano, that's the midi file I downloaded from the piano cover the guy did, I kept it there because it added a little depth. That's the basics of it anyway. =)