i was wondering if anyone knew how to play it and wether it is better to play it with a capo on the 2nd fret or not
I don't play it with a capo. There are a few good tabs on the site for it that don't use a capo, and they sound just fine.
This is a good question for youtube.
I found this, http://www.youtube.com/watch?v=-rfPKodCP6g&feature=related, and it looks like Jack Johnson is playing a Cole Clark FL-1 in standard tuning without a capo. The tab on this site with 5 stars and 56 votes is as accurate as I can tell from that video. However, if you plan on singing it, you may need a capo, but it is at you discretion.
Yeah i play it without a capo and it sounds very similiar if not exact. I dont remember exactly which tab i got it from but i know it was from this site. It's a great song by the way.