I personally think of "trial" as being able to use a product for a set amount of time in order to assist the consumer in the final decision of whether to purchase the product or not. I have not yet heard of any MP3 file that can be disabled after a set amount of time as a trial basis and can not be played again until you pay for it. If there is such an MP3 file and it gets really popular, you may be sitting on a gold mine. Other then that reg fee with no content. Maybe "sample" would be more suited? I don't think a showcase listing will help this one much. GL