I briefly toured the product tonight. I do not see anyway to load product to Amazon. Also, I do not see any way to estabilish a parent child relationship for inventory items. Please adivse.
We let Amazon sellers upload their items using Amazon simple lister or advanced lister (excel format downloadable from Amazon).
Our system can 1. download Amazon orders by using API (one click), 2. update Amazon Q'ty API (one click), 3. update shipping status and upload tracking # if you use our shipping management by API (one click).
For family items, you can use related items or category on the last tab from item page.
If you create a category for group of accessories (which has option for web active), you can simply link the category and buyers will see the all related accessories.