Hi, Laurie. This probably won't help, but . . . I also have an iMac, and i LOVE iPhoto, but not the organizer.
I use a dedicated iPhoto library (you can have a lot of libraries) to organize my supplies. I create an event (folder) for each product, using the marketing images, and occasionally the included sheets of embellishments, word art, etc. Then I add key words to enable me to find products by color, season, topic (women, children, travel . . .) and/or specifics such as flower, ribbon, button, etc. You can also have a lot of keywords.
The actual products are filed in a set of nested folders on an EHD, using categories similar to the keywords. This way I can pull up in iPhoto all the products that fit my current need, and easily choose one, or a few, to try with my photos - and I don't have to remember them.
This sounds like a cumbersome system, but it works for my organizational style. I hope you find a system that works for YOU.