Online FilterZen How-To Tutorials:

The following articles from the ROXORITY.com FilterZen Product Blog further describe how to accomplish commonly-requested tasks with FilterZen:

• How To Create and Set Up Filter Web Parts Programmatically — describes how to programmatically provision Web Parts to Web Part Pages in general, and then specifically how to populate a FilterZen Filter Web Part with Filters and configure both its Filter settings and Web Part settings from C# or other .NET code.
• Using Value-Range Filtering and CAML Operators in Filter Web Parts — introduces the FilterZen CAML-Filtering mode and how to achieve all kinds of dynamic range filters such as date ranges ("from ... until"), numeric ranges ("between") or even textual ranges ("A-G", "H-O", "P-Z" etc.)
• Wild-Card Search ("Contains" Filtering) with Filter Web Parts — describes how the FilterZen CAML-Filtering mode and the Contains operator can be used to achieve wild-card-like filtering against List View, Data Form, Data View and Business Data List or Related List Web Parts.