The home page photos are displayed Auction Script only when you select “Featured”  on hone page, along with others like highlight, bold, etc. This fee can be set to free or paid in fee settings.
Regarding design files and template editing, please duplicate the folder themes/default and rename it to any name and edit the template tpl files and. Cs’s files for styling and then choose this new theme from administration.
Please submit a ticket at for tracking this discussion and proper support.