earliest version of Photoshop that natively opens .CR2?

[clay]

Nope, I'm talking about a Canon Camera RAW format, .CR2. You used to need a separate program to save the RAW image as a TIFF or whatever, then you could open the resulting TIFF in photoshop.

So...I'm looking for someone that knows if CS will open a .CR2, or if that version of PS still needs a 3rd party program to open RAW images to convert into something photoshop can actually use.

Thanks