Edit a .ps file ? OT

Hello SuSE people, I downloaded a form that was created as a pdf. Then converted it to post script. Views fine in ghostview. I want to fill out the form, save it in any kind of format and then print it. Can't seem to figure out how to edit (fill out) the form with ghostscript. Is it just like pdf and am unable to do anything with it? Is it possible? If so, how please? Bob S.