So I thought, what the hell? Maybe I broke something... so I decided to
re-install 3.0. When I couldn't find it on codeplex or anywhere else, I
decided to bite the bullet and install 3.5. But that caused more
problems... I had to manually edit the project files to find the new WiX
folder in the MSBuild folder - that took a while to figure out. But
fixed that, it still won't load.