OK, I really need this attribute deal to go with the corresponding pic in the cart, so I did a quickie:
1. Add a field, I call it "products_attributes_image," to the products_attributes table.
2. Type in the image filename and /or path after "image," for example if your image is inside image folder, then just enter the filename.jpg, or if it's under subdirectory, then enter subdirectory/filename.jpg corresponds to each options_values_id.
3. Make the following changes to catalog/shopping_cart.php
I really haven't the time or knowledge on php to do much of anything else, such as null for the new data field, "products_attributes_image." I really would appreciate if one of the contrib creator or anyone can go through it. Thanks. Please let me know.