How do I generate block of duplicate rows in table with one column having different value

I have a data table called Games in an MS SQL 2005 database with a column called CaseID. CaseID is a foreign key from another datatable called Cases. I want to select a block of rows from Games where CaseID = 1 (for example), and add them into Games with CaseID = 2 (for example). I am struggling to write the SQL query to do this. I am working in Visual Web Developer 2008 Express Edition. I am building an ASP.NET 3.5 page with code in Visual Basic.