570714 Customize C# invoice printing 2

Need an experienced .Net programmer to add a class for printing invoices as part of an existing invoicing solution developed in C# (VS 2010 w/Framework 4.0). The project was recently outsourced by us. Although it is ticking cool, we have no documentation at all, the author is not available any more and we want to customize printing according to several plaintiffs put forward by our client.