Zen cart simple fix to shopping cart and invoice

Hello I had a guy working on my site...and disappear I need 3 things 1-. Shopping cart in product_info was working fine but something happen and stop working when you click ADD TO CART a widow open with the item attributes etc now I'm only getting just the tittle...is something very easy if you know what you doing The picture for the [login to view URL] is how look before now I only get the tittle 2- I have the add-on "edit_order" in admin I need couples changes to this add-on The picture [login to view URL] I need to be able to edit couples things example "total price" etc 3- This page is on a folder is not live....but after the changes i need you to moved this page..to be live and let see have you work and your price...because i have more projects in the future This page is heavy with a lot of extra work is not a plain zen cart Experience ONLY please Thank you