Script revision

Hi I paid a freelancer to develop a script for me for [login to view URL] main backbone of th script is complete and i need some few touches and integrattiondone to it. The link to a working demo is: [login to view URL] Currently what the script does includes: 1. it allows musicians who have installed the script to sell downloadable mp3's,CDs. etc 2. Create and sell ringtones,screen savers etc Features i need revised: 1. The admin area is currently pathetic and i need a new redesign and a couple of features 1a. The current guest book integrated in the script is soo unprofessional and too simple and i need it changed(i want the admin to be able to edit,delete mesages) 2. i need a mailing list subscription added to the [login to view URL] visitors to the site can register for a mailing [login to view URL] at the admin back end HTML/Text email should be able to be sent to all users on the mailing [login to view URL] there should be a link for users who want to delete their emails from the list.