I have a client that has asked me to modify a custom webpart on their sharepoint dashboard. The webpart was developed by another developer that is no longer available. I do a lot of work for them doing VB.NET and Access applications. They have the Visual Studio 2005 code for the webpart and I understand most all the code and can make my way through it. My problem is trying to figure out how to test and publish the new change to the webpart. The current webpart has columns and they just simply want to add a new column with a link to a SQL report. I believe I can do that part but I need to know how to replace the webpart file on the production server after I backup the current webpart to see the results. Can someone please tell me how to do that?