The song is in G, the chords played on the keyboard are D - C - G
1 & 2 & 3 & 4 & 1 & 2 & 3 & 4 & 1 & 2 & 3 & 4 & 1 & 2 & 3 & 4 &
D_______________C_______________G______________________________

He also plays it on guitar in a few places:

e|---2-------0-------3---------------------------|
B|---3-------1-------0---------------------------|
G|---2-------0-------0---------------------------|
D|---0-------2-------0---------------------------|
A|-----------3-------2---------------------------|
E|-------------------3---------------------------|

Most of the song, I believe he's playing around with these 4 notes:

e|--------------------------------------------|
B|--------------------------------------------|
G|---0---2---3--------------------------------|
D|--------------3-----------------------------|
A|--------------------------------------------|
E|--------------------------------------------|

Here's some examples to give you an idea.

e|--------------------------------------------|
B|--------------------------------------------|
G|--3p2p0-----3-3-0---------------------------|
D|--------3-3---------------------------------|
A|--------------------------------------------|
E|--------------------------------------------|

He sometimes bends the A#:

e|--------------------------------------------|
B|--------------------------------------------|
G|--3b5--3b5rb3p2p0---3-3-3p2p0---------------|
D|------------------3-------------------------|
A|--------------------------------------------|
E|--------------------------------------------|

He does this lick a few times throughout:
e|--------------------------------------------|
B|--14b15rb14p12----12-12---------------------|
G|---------------13-------13------------------|
D|--------------------------------------------|
A|--------------------------------------------|
E|--------------------------------------------|

Pluck it gently and let this note ring when you hear that clanking sound throughout the song:

e|---2*---------------------------------------|
B|--------------------------------------------|
G|--------------------------------------------|
D|--------------------------------------------|
A|--------------------------------------------|
E|--------------------------------------------|

If you have someone backing you with the chords or you're jamming with the song, the solos
should come pretty instinctively, but for me personaly, the G Dorian Mode sounds good with
song, don't be thrown off when you see the term Dorian Mode. All you do is add a note in 
places on the pentatonic scale where notes are 3 half steps away, add a note before
second note... If that makes any sense.

Skrew it... Here's a tab for the first position Dorian Mode in G:
(an octave higher, in the area the solos are played in)
e|-----------------------------------------------------------15--17--18---|
B|-----------------------------------------------15--17--18---------------|
G|-----------------------------------14--15--17---------------------------|
D|-----------------------14--15--17---------------------------------------|
A|---------------15--17---------------------------------------------------|
E|---15--17--18-----------------------------------------------------------|