jq,
It is not necessary for you to "intergrate" the Cleaner and the Pro version.
The Avast Cleaner is a standalone application for the specific types of viri named in the information.
The Pro should be all you need since it is updated whenever a new "infection" is discovered. Pro uses the IAVS or "Push" update system whereby Avast can immediatley send you a "forced" update for any newly discovered threat.
Hope this helps.