i'm assuming by the way you describe your playing, you'd like to attempt a mellow acoustic section...try the section in porcelain heart. metalheadz just posted a video. above all, i recommend that you pick a favorite part, and commit to learning it, whether it be by tabs, video, or straight ear. i recommend attempting it by ear. most songs on guitar start with the root or tonic note on an open string. for example, benighted is in E, and starts with the low E...patterns in the ivy II is in D and starts with the open D...i've found that for all songs...once you figure out the root/tonic/key note, you can figure out the initial chord and finger/fret placement. from then on out, its a matter of find where mike "must" have put his fingers, and its usually in the most logical and usually simple place.
as for bar chords, that simply takes tedious and painful practice. hope leaves is easier if you have the capo, which is put on the second fret, although its still quite the stretch, especially on an acoustic guitar.