Delerium - A Poem For Byzantium chords

I'm pretty sure the entire song follows this pattern:

dsus2 - am - c - g
[ Tab from: http://www.guitaretab.com/d/delerium/287770.html ]
I think the actual chords might be a little bit different, but these sound alright if 
you play along as you listen.

There's a bit more to it, such as some bass notes here and there but hopefully this will 
inspire some people to make a better tab.