1) Install NUnit 2.5.1
2) Install NUnit 2.5.2
3) Uninstall NUnit 2.5.1
and start menu shortcuts are left behind.
Registry entries and shortcuts should be removed.
I think we need to re-GUID all components for each release. With any luck there's an easy way to do this with recent versions of Wix. In the past this hasn't been fun!