creo8 config.pro option documentation for: PIPING_DESIGN_METHOD 
piping_design_method
non_spec_driven
*
, spec_driven
, user_driven
Specify the piping design method for the piping project.
non_spec_driven
- Activates the Non Spec-Driven piping design mode.
spec_driven
- Activates the Spec-Driven piping design mode.
user_driven
- Activates the User-Driven piping design mode. This mode allows you to switch between Spec-Driven and Non Spec-Driven piping design modes and convert existing assemblies at any time in the design process.