With CXOffice version 4.0! Just install it as an unsupported app (using XP as the OS), and then use the following command-line to start it:
~/cxoffice/bin/wine --winver winxp --workdir "C://Program Files//Adobe//Photoshop CS" --check --cx-app "C://Program Files//Adobe//Photoshop CS//Photoshop.exe"
The installer doesn't seem to set up menu entries and file associations 100% right, and the application has given me an inexplicable error or two, but it mostly works. I'd give it a bronze medal right now!