555766 Script modifications needed

I am going to buy this script: [login to view URL] I would like the following mods: 1. Add the ability to upload photos by link (link to photos already on the web) 2. Add another optional field in the upload photo page where I can add a hyperlink to the photos. When someone is viewing the photo we also need to add a link icon so it can take them to the hyperlink if one was added. 3. Add facebook and twitter login and signup 4. Add facebook social plugin for comments, so people can comment regular or by using the facebook comment. Please look at the demo of script above and bid on the cost to do those changes.