If you are hard up to having all of this in the same solution, you can always set up a new build configuration and tell Visual Studio to just ignore those other projects without much difficulty.
Each entry in the Project contexts box
in a solution configuration represents
a project in the solution. For every
combination of Active solution
configuration and Active solution
platform, you can set how each project
is used. (For more information about
solution platforms, see Understanding
Build Platforms.)
And you can also select the checkbox next to the project to toggle it in or out of the current configuration.