How to change the play/pause keyboard shortcut?

[XMizer]

I'm not talking about F8, I'm talking about control+shift+space.
When I press control+shift+space it plays/pauses my files from my iTunes. I want to change this because it's interferring with another shortcut. How do I change it? I already tried looking for solutions online but I can't find anything.

 

[r.j.s]

Have you looked in the Keyboard section of System Preferences?

 

[XMizer]

Yes. I didn't find anything that can help me, unless I missed something.