cmyk in gimp

Get and install Separate+ under Win32

Go to Separate+ homepage and download the zip version. Here we use the separate+-0.5.4.zip. Just extract the zip file to elsewhere, and copy the 3 files (icc_colorspace.exe, separate.exe and separate_import.exe) from bin\win32_gimp2.4\ to %PROGRAMFILES%\gimp-2.0\lib\gimp\2.0\plug-ins\. Go to Adobe home page, accept their EULA, and download the ICC profiles for CS4. Here we get the AdobeICCProfilesCS4Win_end-user.zip. Extract the zip file. Copy all *.icc from CMYK and RGB to %SYSTEMROOT%\system32\spool\drivers\color\. That's it.