I have a custom shopping cart script, with multiple items. It currently does not have a facility to add/edit orders from the admin panel, I need this implemented, and it should be like magento's add/edit functionality, i.e. full control over product options, quantities, ability to change prices and ability to add comments. Also, keeps a track of comments added and has an option to send comments to customer. Basically, have a look at magento and thats what we need.