How do I open RAW picture format (.CR2 ) on my Adobe Photoshop CS3?

I downloaded a cracked version of Adobe Photoshop CS 3 a while back. I had a Canon EOS 400D then, and I used to be able to open up my RAW files (.CR2) pretty smoothly. Now I just purchased a Canon PowerShot G10 & am no longer using EOS 400D. But the Photoshop doesnt seem to be able to recognize the .CR2 files... show more I downloaded a cracked version of Adobe Photoshop CS 3 a while back. I had a Canon EOS 400D then, and I used to be able to open up my RAW files (.CR2) pretty smoothly.

Now I just purchased a Canon PowerShot G10 & am no longer using EOS 400D. But the Photoshop doesnt seem to be able to recognize the .CR2 files taken from this camera. Each time, I tried to open it it prompts 'Could not complete your request, because Photoshop doesnt recognize this type of file'.

I tried once again, to open up a .CR2 file from my prev EOS 400D. And once again, there were no issues.

Any ideas why this happen? Solutions & suggestions would be greatly appreciated.

BTW, I'm using:-
Mac Leopard OS 10.5.8
Adobe Photoshop CS3 Extended Ver 10.0 (cracked version)
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