Real Estate Catalog

I am working on my first MySQL/PHP app. It is a real estate catalog. To build it, I am modifying the shopping cart found in Welling & Thomson's "PHP & MySQL Development". I think I am getting the gist of the process, but could use a little help from more experienced folks out there. When the app is done, I'll make the source code available. If you are interested in helping work out the kinks, please email me (php@ursastudios.com) If you'd rather I bore everyone with the details, let me know and I'll post my questions to this thread for all to see and chime in on. Thanks Doug Daulton