WP E-Commerce Custom Variations Plugin

On my website we sell stickers. I currently have one variation (size) on the product page for each product. The pricing is dependent on the size. I need to be able to add 1 or 2 drop-down lists (depending on the product) that don't act as real variations. The drop-downs are color selectors. Certain products will have a choice of one color, and some products will have two. I may need to be able to have 3 or 4 drop-downs, but so far I think 2 is enough. The drop-downs should be mandatory and the data from the drop-downs should be passed along with the transaction details. I need to be able to customize the colors, and sequence, that are listed in each drop-down. I think the best way would be to make it so that I can add a shortcode to the product page, or line of code to the product page, to add the drop-downs. Let me know if you have any questions or input. Thanks.