creo4 config.pro option documentation for: EXPORT_3D_FORCE_DEFAULT_NAMING 
weld_edge_prep_groove_depth
<user-defined depth value>, .25
*
Specifies the initial default groove depth for edge preparation.
tion file names when exporting to the STEP and Neutral formats.
yes
- Uses the application file names when exporting to the STEP and Neutral formats. You must accept the default file name.
no
- Adds a suffix to the model file names.