just click this link here: http://www.jackulator.com/smf/index.php?action=media;sa=post;album=15
and as long as your file isn't larger than 8MB it should upload fine and after there will be a link you can provide should you decide to post a new topic about your board
if your file IS larger than 8MB, you can always upload it to the site with an FTP program like Filezilla (free) and then PM jackulator for the URL
enjoy
