I had a go at trying to work out Believe, here's what I could come up with. There are a lot of extra little notes all around the place that John adds, so no doubt I will only have got a few of them! Anyway, here the outline for what is played... 


Tuning - BAC#F#BF#

Intro/Verse

F#|---------------------------0-------|--------------------------------|
B |-------2-------2/3-----------------|-------2-------2/3--------------|
F#|---0-----0-0-------0---0-------(0)-|---0-----0-0-------0---0--------|
C#|---------------------1---1--(1)----|---------------------1---1h3h1--|
A |-2---2-------2---------------------|-2---2-------2------------------|
B |-----------------------------------|--------------------------------|
    1       2       3       4           1       2       3       4                                  


Chorus

F#|-0---0---0---0--0----0--0---0--0-0-|-0/0--0--0---0-0---0--0--0--0-0-|
B |-10--10--10--10-10---5--5---5--5-5-|-5/7--7--7---7-7---7--7--7--7-7-|
F#|-0---0---0---0--0----0--0---0--0-0-|-0/0--0--0---0-0---0--0--0--0-0-|
C#|-8---8---8---8--8----3--3---3--3-3-|-3/5--5--5---5-5---5--5--5--5-5-|
A |-----------------------------------|--------------------------------|
B |-----------------------------------|--------------------------------|
    1       2         3        4        1       2       3       4   



The strumming varies a bit on the chorus (and the verse for that matter) so the above one is just an example of one that is played. I'll sit down and tab the rest once I get some more time...