Song Help Request Jay Z Run This Town

Hey guys I've been trying to figure the chords out, but I can't seem to get them

could someone help me?

Here's the instrumental
http://www.youtube.com/watch?v=KDy_2QKj5Qg

sometimes it goes
Eb, Bb, Eb, Ab

sometimes it goes
Eb, Bb, Eb, Bb

It just depends which part of the song you're at.
i'd recommend B-tuning (f#BD#G#) for this so you can reach a lower Ab using 2100 unless you don't mind playing a half-step higher than the video.

thanks! ill try it soon!