When installing BCM 2007 you may encounter an error "Setup failed to install the required component office 2007 interop". In my experience this has almost always been caused by an issue with Office 2007 Primary Interop Assemblies (PIAs), which is the glue between Office and .NET applications.
Without going into the why this happens (it's way to long winded and boring, but you can read more on this blog). Here is the quick fix. Simply copy the application that you are trying to install to the %temp% folder (Start > Run > %temp%), and rerun the setup. The installation will pick up everything it needs to know about your .NET apps, and will complete nice and quickly!