WordPress: plugin e-Shop OR WP E-Commerce CUSTOMIZATION

I have an existing website built with WordPress, themed with ElegantThemes. I will be using either plugin: eShop or WP eCommerce. Here's what I need: * We sell 1 product * Before the customer is sent to the Payment page, they need to go through and be directed through 4 other pages FIRST * Each page the customer needs to be able to UPLOAD their own photos (stored on their computer), along with photo descriptions * Each page needs to have a progress bar at the top, showing progress through the 4 pages (see attached) * I need to be able to login to my WordPress admin section and download all images for EACH customer separately very easily, at once, with one click * I am OK using either plugin, it depends on which you feel more comfortable with * See attached for what I'm looking for