Aye, I've done that with a press start screen and it detects what player presses start.
Only problem I seem to have, is when I open up Visual Studio 10, Express. I can't open the project as it keeps displaying,
"The application for project '(directory)\FILENAME.csproj' is not installed. Make sure the application for the project type (.csproj) is installed."
Thus I can't test it on Xbox or PC.