hey dude - don't know if you're aware of this, but if you want people to be able to use the flash mp3 player for your pranks you should upload each of them to the download center and then use the code it gives you to embed the flash player in your posts
most people (myself included) would rather hit a play button rather than downloading attachments
check here if you have questions:
http://www.jackulator.com/smf/index.php?board=29.0and if there isn't a topic for your question make sure to create a new topic
thanks man