I played along to an acoustic version of Sterling Knight playing this song. Here's the video:
http://www.youtube.com/watch?v=JljrrkAdRtw

The camera shots of the guitar didn't always match up to what he was actually playing, 
I fixed it up by ear. Let me know how it goes when you play it! =)

Here are the chords I used:
Cm - x35543
D#5 - x68866
A# - 688766
G# - 466544

Intro Cm D#5 A# G#

Cm
I'm no superman
D#5
I can't take your hand
A#
And fly you anywhere
G#
You want to go (yeah)

Cm
I can't read your mind
D#5
Like a billboard sign
A#
And tell you everything
    G#
You want to hear but
Cm              A#
I'll be your hero
D#5           A#
I, I can be everything you need
              G#
If you're the one for me
                  Cm
Like gravity I'll be unstoppable
D#5           A#
I, yeah I believe in destiny
            G#
I may be an ordinary guy
                 Cm
With heart, and soul
    G#            D#5     A#
But if you're the one for me
                    G#
Then I'll be your hero
  A#
Ooh
                  G#
I'll be your hero Oh Yeah
A#
Yeah, I'll be your hero


Cm
So incredible
D#5
Some kind of miracle
A#
and when it's meant to be
     G#
I'll become a hero

Oh, so I'll
D#5
Wait, wait wait,
           A#
Wait for you
                 G#
I'll be your hero
   A#
Yeah

D#5         A#
I, I can be everything you need
              G#
If you're the one for me
                  Cm
Like gravity I'll be unstoppable
D#5           A#
I, yeah I believe in destiny
             G#
I may be an ordinary guy
                 Cm
With heart, and soul
    G#            D#5     A#
But if you're the one for me
                  G#
I'll be your hero
    A#
Yeah
                 G#
I'll be your hero
A# [strum once]
Yeah, I'll be your hero
  D#5 [strum once, let ring]
Hero