How to install gogle doc embedder with paid download plugin.

I want to use google doc embedder in my website,people can view the document,using the google doc embedder but they can download that full version of my documents after paying for that using paid download plugin,please help me to do this,This can be done or not,or is their any simple way to do this.This module is just like scribd.com where people can download the documents after paying for that.Thank you