Reading for Custom Flex Preloader

I've read Ted's Flex 2 Preloader before I implemented a preloader class in my project.
However this class seems not working as I expected. Loading is quite glitch. I found in the code there is time interval to check status and display preloader, which slow down the process of loading animation.
After a couple of months, I retrieve this problem and found some new entries explained in detail how the preloading proceed and which class is not good to be used in preloader class.

• Flex 3 Pleloading Explained is new and has upcoming post(not posted yet) to explain the preloading in Flex;
• Custom Flex 3 Lightweight Preloader gives a very good example to build an preloader;
• Implementing A Flex 2 Custom Preloader has one Class from basic implementation of IPreloaderDisplay which is simple and detail explained.

I hope I can try to redo this preloader next week for my project.