Swf preloader

Need a preloader for SWF files. The script that loads the SWF files is written in PHP, I will provide it. The pre-loader is for showing content while the SWF file loads. The preloader must show content for an adjustable time (say 10 seconds) while the SWF is loading and playing below it. I already have a preloader that shows content and then starts playing the SWF. But I need the SWF to LOAD AND START PLAYING below the preloader content before it finishes. If you need more details please ask me. Thanks