Adding a service ?

Hello I would like to add a new kind of service into my KDE, namely a view service. I created a shellscript that takes a named document (a LaTeX source doc), compiles it, and in case of success calls kdvi (kviewpart) . It's easy to connect this script to the application/x-tex mimetype, so I can do an "open with" onto my latex files. I just want to have my script connected with the "preview" services. How to do that ? Robert