In order for the console to know how exactly to control your fixtures, which channel does what and in which range, there is a system called personalities. As of the time of writing this, there are some different formats, the most important being (for you as an Avo fan ) the d4 files. There is already an extensive fixture library included with Titan, and you can get an updated version which is constantly extended at http://personalities.avolites.com/. However, sometimes you don't find what you need, or you are just curious, or you want to tweak the existing personalities. This section of the wiki is intended to help you in doing so.
However do not forget to file a request at http://personalities.avolites.com/Request%20Queue.asp: in doing so you make sure this one will get added to the library and will be available to all other users, too.