Software installation on site

I'd like to integrate a Flash coloring app on my Shopify website. This is the app: [login to view URL] And this is my website: [login to view URL] I want site visitors to be able to color in pages in the app, and then send their work directly to cart and open up the checkout page. So, in other words, I need 2 things done: 1) App installation on my Shopify site 2) Addition of a button to the app, that will send work directly to the Shopify cart. Here is an example of someone who is doing the same thing, and sending artwork to Zazzle: [login to view URL] Thank you!