creo6 config.pro option documentation for: PIPING_FLUID_PARAMETER 
piping_fluid_parameter
(Spec-Driven Piping)
yes
, no
*
Specify pipeline fluid parameter availability.
yes
- Piping sets the Parameters
tab in the Create Pipeline
dialog box as available.
no
- Piping sets the Parameters
tab in the Create Pipeline
dialog box as unavailable.