search for: fields_for_ferrett

I have spent a couple hours researching the FerretOnRails and acts_as_ferret plugin, and am very pleased with what I see so far. My question is how to have my application, with multiple models: Speakers Talks News etc.. With all varying :string and :text column types, to be able to use a single index by which I can produce a search on. I will go through each of the models and add a