66595 auction software modification

Hello. I am using a version of the MakeBid Auction software (which is an upgraded version of he everysoft auction freeware). It has a built in accounting system that I believe emails the users an invoice each month if they have a balance owed. I wish for it to send a carbon copy of the same emails to the administrator of the site. I am unsure how to add this myself. I can only send payment through paypal. I would like the work to be guaranteed for thirty days in case of a problem. I am also in a rush and need this done quickly, please. Thank you for your time.