Replace Flex preloader bar with an indeterminate spinner?

I have a AS spinner class that I downloaded from Jake Hawkes (click here to see it running).

I want to replace the flex application preloader with this spinner. I have previously used custom preloaders, but that was just for editing what 开发者_运维知识库already existed. Anyone know how that spinner.as could be used instead of the loading bar?

EDIT This is the extremely cool custom preloader that Im going to try to edit (it extends Sprite) view source enabled: http://blogagic.com/14/the-blogagic-custom-flex-preloader

Brian

Little late but I just came across this site. The spinner here seamed pretty well developed and documented.

http://flexdevtips.blogspot.com/2011/05/simple-animating-preloader-and.html

WindowedApplication has preloader property, which you can set class of your preloader. This class should implement IPreloaderDisplay. Google has answers for this in top results: http://askmeflash.com/article/7/custom-preloader-progress-bar-flex.