Sorry, but this is outside the scope of our support. It would involve very specific coding to save data from your plugin to the database, and we would also need to change the shoppingcart plugin to show the name. I hope you understand that we can’t do this type of work for free. If you want I can bring you into contact with someone who might be able to help you, but do understand that there are costs involved.
If you want us to bring you into contact with a developer, email us via our profile page on themeforest: http://themeforest.net/user/redfactory