Then where can I download the Sumo Competition for Microsoft Robotics Studio (1.5). I check the website that was provided in the very first post, but all they have is something related to 

Microsoft Robotics Developer Studio 2008 R2 Express Edition

so where can I get Microsoft Robotics Studio (1.5)? I know that in vpl mu can use the simulation program they provide you, but it runs the program provided not my own