There is always Your Uninstaller Pro, or Revo Uninstaller. These will uninstall anything and take the registry entries with it.
Roloccolor, Gamestop has borked the Impulse Archive system and they no longer work. At least, that's what I think Zubaz said.
I tried to install one and got a dialog telling me to go to Impulsedriven.com and unlock it. IE can't load the page.
Makes no sense to me since it's supposed to be an offline install.