Customizing Electronic Payment Interface

I am customizing the electronic ACH payment interface for our bank. I grabbed a copy of the Payment_US_ACH_Domestic C# project off the server. Is there anyway to setup Visual Studio so that I can run and debug this while in Visual Studio? I fixed all the references, but I cannot find a file named SysAssemblyInfo.cs. So far I have been making a change and copying the C# files to the server, placing them in a payment folder under \Server\Erp\EI\<OurPaymentProgram>. I then process a payment, check the logs or output if it gets that far. This is taking forever, is there a better way?