I take absolutely no credit for this tutorial, but I thought I'd share it here on LebGeeks as it could come in handy for some users who are migrating from Windows to Linux.

You'll need a fresh installed and fully updated Dapper, and Windows installed with a fully activated Photoshop CS2.
Now in Ubuntu, fire up a terminal and type the following commands:

* sudo apt-get update
* sudo apt-get install wine (then type yes)
* sudo wine (to create the WINE file structure)
* sudo apt-get install recode (then type yes)

Then you'll need to copy the whole Adobe folder from Windows to /home/YOURUSERNAME/.wine/drive_c/Program Files/.
After you're done doing that you'll need to export the Adobe Photoshop CS2 registry keys, to do that:

* Run the Registry Editor by typing regedit in Run.
* Export HKEY_LOCAL_MACHINE/Software/Adobe/” to “adobe.reg"

The next step is to copy that file to Ubuntu and convert it to the encoding of your system. For example, if your Ubuntu has as default charset ASCII and Windows has UCS-2 then “$ recode ucs-2..ascii adobe.reg” would do the trick.
After you converted your adobe.reg file, type “$ sudo wine regedit adobe.reg” to import it to wine.

That's about it, type “$ sudo wine –winver winxp “[path to Photoshop]/photoshop.exe” or simply create a launcher.

This has only been tested in Ubuntu, but it should work on other Linux distros, some people managed to get it to run in Gentoo and SuSE.