That's the thing, I want to "Photoshop Plug-in Settings" menu appears under the Filters menu, but it does happen. I've put the PSPI and pspi.exe.so lib/gimp/2.0/plug-ins folder to folder.
Okay, I get information from
http://www.instructables.com/id/Photoshop-Plugins-In-The-GIMP/step2/Install-the-GIMP-PhotoShop-Plug-In-PSPI/ that is:
"..... Copy the two files PSPI and pspi.exe.so to your personal GIMP plug-ins folder, NOT the system plug-ins folder. Be sure GIMP knows about this folder in the Preferences - Folders dialog. For me , it is ~ / .gimp-2.4/plug-ins /
Test if the install worked by launching GIMP. Once it loads, check the Xtns menu for a new entry: Photoshop Plug-In Settings ...
If the entry is not there, then you are probably somewhat screwed unless you have, or have access to, a CD containing the Photoshop 6 Photoshop SDK. If you do, then you can download the source package, and follow the instructions in the README.Linux file inside the unpacked source tree to install PSPI from source. I did not have to do this, so I can not help you here. But, I do know PSPI will not compile without the pssdk6 (so says the README) ..... "
Now, I do not know how to work it. Any ideas?