So for instance i am assuming that in the SearchDocumentParameters you have attributes such as Index, Type etc I would assume that this is where you also set up the link to the Site you are trying to browse , as there is a Parameter called SiteName, but no explanation of how this is built up. I have also read in my many trawling s about Possible User and Password Parameters, Again their is a great deal of overlap between the general smart search parameters in the Portal engine and the Custom Search. Must say, getting totally confused. I have even spent a great deal of time on the Lucene site as Kentico uses the library, trying to understand the correct mappings....
Best Regards