Just an alternative advice: as Visual Studio "Setup project" template is about to be deprecated, consider switching to better installation project framework. I would strongly advise open-source WiX, where you have a lot of freedom (and, by default, the button you don't like is absent):
http://en.wikipedia.org/wiki/WiX[
^],
http://wixtoolset.org/[
^].
Actually, it is more legitimate then existing "Setup" project type: it is fully integrated to comply with MSBuild project file standard and provides smoothest integration in Visual Studio, again, using standard definitions of project properties (Configuration, Platform). Compared to that, existing "Setup project" type is just the outlaw.
—SA