Geopak - Units


I am using Power Geopak v8i SS4.

I want to change the default units to foot instead of US Survey Foot, but my system keeps defaulting to US Survey Foot, without the option to change.  When I open my file, the "Options" button is grayed out, so I cannot change the default units to Foot.  I assume this is happening because I am using a DOT seed file that is customized for US Survey Foot.  Is there a way I can change to the Foot units and continue to use the DOT work spaces, or can I just make my own default seed file from a Bentley default file?  If so, where can I locate such a file?