how to make order payable only after confirmation?

We're trying to build a shop with CS Cart 4.0.1, and we need to let users pay their orders (via the usual payment processors, eg. PayPal) only after they have been given green light by a shop admin. Example workflow:[list=1]

[]customer shops around, goes to check out, confirms his order

]order shows up in status “Received”, but CS Cart wouldn't let the customer pay it

[]admin reviews the order and changes order status to a new one, like “Payable”

]CS Cart lets the user pay

[*]when CS Cart's payment processors receives the payment, it automatically switch the order to status “Completed”


I did look around but I cannot seem to find an option to do that nor an add-on implementing this functionality. Anyone knows if it is possible (either “stock” or via addons), or if it absolutely needs a patch to CS Cart code?