You can install Fx operators to the following locations:
• The Softimage home directory under \Application\bin\ufos.
• The factory, users, or workgroup add-on directories under \Application\fx\ufos.
If an Fx operator is found in any of these directories, it will appear in the Fx Operator Selector section of the Softimage Compositor’s interface.
Autodesk Softimage v7.5