Search configuration

Hi all,

I have seen the search-configuration of stop words (Administration > Settings > Advanced > Search). Are there any other configurations on the search provider (LuceneSearchProvider) to define the field-relevance, if I have custom fields http://www.sitefinity.com/blogs/stevemiller/posts/12-07-31/sitefinity_-_adding_custom_fields_to_search_index.aspx.

Thanks in advance.
Roland