WPI - Visual Studio 2010 SP1

I am at a total loss when it comes to WPI and the continous reinstallation of Visual Studio 2010 SP1. I have even went as far as creating a virgin machine and installed VS2010 and then immediatly installed the tools from WPI. After completion (which shows success) I reboot the machine and then load the WPI again to add on secondary tools. At which point, the WPI triggers an installation of the SP1 -- 90 minutes later, the list shows up as successful, and other tools are listed 开发者_StackOverflowfor installation.

Every time you run WPI, it wants to go through the VS2010 setup over and over. Is there any way to fix this behaviour?

Thanks in advance.