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
Eb5 - x68866
Bb - 688766
Ab - 466544

Intro Cm Eb5 Bb Ab

Cm
I'm no superman
Eb5
I can't take your hand
Bb
And fly you anywhere
Ab
You want to go (yeah)

Cm
I can't read your mind
Eb5
Like a billboard sign
Bb
And tell you everything
    Ab
You want to hear but
Cm              Bb
I'll be your hero
Eb5           Bb
I, I can be everything you need
              Ab
If you're the one for me
                  Cm
Like gravity I'll be unstoppable
Eb5           Bb
I, yeah I believe in destiny
            Ab
I may be an ordinary guy
                 Cm
With heart, and soul
    Ab            Eb5     Bb
But if you're the one for me
                    Ab
Then I'll be your hero
  Bb
Ooh
                  Ab
I'll be your hero Oh Yeah
Bb
Yeah, I'll be your hero


Cm
So incredible
Eb5
Some kind of miracle
Bb
and when it's meant to be
     Ab
I'll become a hero

Oh, so I'll
Eb5
Wait, wait wait,
           Bb
Wait for you
                 Ab
I'll be your hero
   Bb
Yeah

Eb5         Bb
I, I can be everything you need
              Ab
If you're the one for me
                  Cm
Like gravity I'll be unstoppable
Eb5           Bb
I, yeah I believe in destiny
             Ab
I may be an ordinary guy
                 Cm
With heart, and soul
    Ab            Eb5     Bb
But if you're the one for me
                  Ab
I'll be your hero
    Bb
Yeah
                 Ab
I'll be your hero
Bb [strum once]
Yeah, I'll be your hero
  Eb5 [strum once, let ring]
Hero