I can automate/semi-automate the form filling process so you can get to the payment page as fast as possible. If you like, I can modify the site UI so you can modify your pre-selection on-the-fly. However I'd like you to clarify on your preferred site behavior (eg: clicking one the shoes will add it straight to the cart, or clicking on the shoes and another button to checkout, not clicking any shoes at all - the script already knows what shoes you want?)
I plan to complete this project with a single [login to view URL] file which you can easily install with drag&drop on to Chrome browser.