Misc Cartoons - Phineas And Ferb Theme chords

I haven't found these chords anywhere on Internet. I needed the chords for my 
English class with Spanish primary school students. They love this song, so I had to
transcribe it so they can sing it along with the original English version and me playing
over it with my electric guitar. It looks like a lot of fun for them. So here it is for
anyone who might need to use it too.

First verse, C-7 with G on the bass could be played as Eb, but G on bass, on a Eb triad
 does not sound good at all. The same stands for the Bb-7 chord and the F on the bass
. It could be played as Db triad with same result; it does not sound fine. 

The last part of the theme (from Ab and so on) I play it with no roots. If you play it
 with a bass player, let him do it. So basically I play the fifth chord tone on fifth string,
 tonic on fourth and the third chord tone on third string. Then I finish with the
 Ab final chord playing root on sixth string and vibrating the whole chord with the
 tremolo bar (whammy bar) until stop. I sounds pretty good this way. Of course, you
 will need some distortion (although not too much).

The song is on Ab major but it could be that, because the arrangement has a brass
 section (instruments on Bb and Eb), the original guitar player might be tuning the
 guitar a half tone lower (Eb tuning on sixth string) and then playing the song on A
 major. 
[ Tab from: http://www.guitaretab.com/m/misc-cartoons/206558.html ]
Jaime Alejandro
Bustarviejo
Madrid (SPAIN)


Ab                      C-7/G
There's 104 days of summer vacation
Bb-7/F                  Ab
And school comes along just to end it
Ab                      C-7/G
So the annual problem for our generation
Bb                      Eb
Is finding a good way to spend it


Like maybe... 

Ab
Building a rocket

Or fighting a mummy
Bb
Or climbing up the Eiffel Tower

Eb
Discovering something that doesn't exist (Hey!)
Ab                          Ab   G   Gb   F
Or giving a monkey a shower

F
Surfing tidal waves

Creating nanobots
Bb                                (G chord and third tone chord as guitar solo)		
Or locating Frankenstein's brain (It's over here!)

G
Finding a dodo bird

Painting a continent
Eb
Or driving your sister insane (Phineas!)

Ab
As you can see

There's a whole lot of stuff to do
Bb
Before school starts this fall (Come on Perry)

Ab               Gb                  F
So stick with us 'cause Phineas and Ferb
Bb          Eb        F (Ab on bis and end)
Are gonna do it all! (bis)

 (Mom! Phineas and Ferb are making a title sequence!) (Ab at end)

...enjoy it....