Open up the obj_import.py, in the scripts folder, in a text editor.

Look for this line at the bottom of the script, under load_obj_ui.

IMPORT_CONSTRAIN_BOUNDS= Draw.Create(10.0)

Just change the (10.0) to whatever value you prefer as default, then save the .py file. 

===========================sigline======================================================

Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.