Building k3b and dbus errors

A while ago we had a discussion about building k3b. The configuration output declared not being able to find the dbus headers. I can resolve the configuration error by building dbus-tqt to install in /usr rather than /opt/trinity. Likewise, I eliminate the same configuration errors with kmplayer. The Trinity dbus-tqt package is not a full package but only replaces four header files and a lib file. Are the Trinity replacement dbus files intended to overwrite the stock files installed in /usr by the distro? Does dbus-1.0 get used by Qt4 apps or is there a different mechanism? I'm unclear how this all relates. Darrell