Been tinkering with the idea of a hierarchy product list on signup based on a parent child relationship between products. If product B & C required product A to be purchased you may have a list that looks like: Product A ProductB Product C Example Real world example would be: Online Cookbook ($10) Video DVD Cookbook ($5) Printed Book Cookbook ($5) Where you have to purchase the Online cookbook to qualify to purchase the video DVD or book. Ideally this would have some AJAX flair where the options would be visible at time of product selection (so when you select online cookbook the "ala cart" options make themselves available underneath) Any ideas/suggestions on how I might pull this off? Thanks!