[antiRepublicrat]

Other posters have directed you at the various flavors of Wine,

It's hit and miss for Photoshop under Wine, and IIRC CS2 doesn't even run right under any distro yet.

GIMP is great for the home user, who doesn't need the 800lb gorilla of image editors. But don't even try to tell a Photoshop pro user that GIMP is a substitute, as it has far too many deficiencies. Some are its own fault (color management, expanded color models), some the fault of the proprietary nature of some of the printing industry, especially spot colors like Pantone and HKS.

[Echo Talon]

CS2 doesn't even run right under any distro yet.

Well, there goes linux... when they get that fixed let me know.

[Echo Talon]

I have used GIMP and can see its shortcomings.

[rzeznikj at stout]

Don't forget about Crossover Office.

There's a cost to it, but the latest version supports Photoshop 7. They're not sure about CS or CS2 yet--these might run as unsupported software.

As for the GIMP, IMO it was designed to be a casual-user replacement for Photoshop--and not intended as a replacement in professional use.

[Knitebane]

But don't even try to tell a Photoshop pro user that GIMP is a substitute, as it has far too many deficiencies.

This is true.

But then a true Photoshop user wouldn't be using Windows anyway.

If you are truly serious about your graphics work, you use a Mac.