GE Refrigerator -- Bottom shelf install

I am trying to install a new frame for the produce drawers on my refrigerator but it is not readily apparent as to how it is removed – screws, clips, etc. The part no. is 237 (although I am also trying to replace 239). Any advice? Thanks!

http://www.appliancepartspros.com/partsearch/model.aspx?model_id=219675&diagram_id=21697829#d21697829

please i need schematic for side by side refrigerator tks denman for last post:)

Please see the below
http://manuals.frigidaire.com/prodinfo_pdf/Anderson/218909400.pdf