yeah, it'll get you started anyway. I just listened to it and it sounds like they might migrate down to Bb for the chorus every once in a while(1st fret on the A or 6th on the E, whatever. i think the A string would be easier).
I was hoping an actual music instructor might chime in here, but I guess they don't peruse the tab forums much.
Don't tak anything I tell you as gospel. An entire volume of encyclopedias could be written on what I don't know about music.
Sounds like some kind of flange to me. But I really shouldn't say.