Configure a PHRets GetObject call

I am the webmaster for a real estate company located in the United States. I am in the process of integrating a new IDX feed into the company website and need a simple piece of code written to pull the images from the multi list website onto our server. We use a server based program called PHRets as the backbone for the process. It is a PHP based system for retrieving data from a multi list IDX feed. Currently, we download the real estate listings into a database on our server which is updated hourly. People who are looking for homes can search the database. The resulting pages are dynamically created. I would like a code snippet that uses the listing MLS number, searches the IDX feed for the photos associated with that MLS number and downloads the photos to the "/images" folder on our server. Thanks!