Changes made to my an exsiting website

I have some changes that need to be made to my existing website. The website is set up right now as a bidding website and I want to change it to make it so the customer can name their price. The shops will in turn be able to claim the job or reject it. Only one shop or tech will be able to claim the job but they can all reject it Right now only the Customer can post a job, I want the Body shops to be able to post a job as well. The job they post will be emailed to the PDR technicians only. In the back end/admin section there are four member types. Shops, Customers, "Salvage yards"and Car dealers. I want to change the "salvage yards" to be PDR techs and make a separate sign up form for them on the site. In the admin section I want to be able to delete shops, PDR techs, Customers and car dealers. So a delete button will be added. I would like to make some wording changes on the homepage. It should be easy to know how to proceed. So for instance their are 4 member types. It will say... I am a customer looking for repairs or I am a body shop looking for PDR techs or I am a PDR tech looking for work. Each on will link to the proper sign up form. Right now their is a link to the existing projects and it it viewable to everyone. I want the projects to only be viewable when they are logged in. All of the programming has been written and is up and operating right now. For this project you will just be adding to what is already their and taking out the bidding option for the shops. See my site right now at www.dingbatbiz.com.