Apple Mac OS X Server v10.6 - Manual (Page 72)

8 Locate the Quartz Composer file (ends with .qtz) which defines the composition.
For example, Contents/Resources/DualSource.qtz.
A .qtz file is a Quartz Composer composition.
9 Rename the file.
10 Open the Quartz Composer file using Quartz Composer, customize it as needed, and
save your changes.
11 Replace the Preview.mov file (Contents/Resources/Preview.mov) with a new preview
movie of the composition.
Selecting a Custom Quartz Composer Compositions
Custom Quartz Composer compositions appears in the User Content area of the
pop-up menu listing all available compositions.
72 Chapter 9 Advanced Podcast Composer Topics