Momcat, if you or any of your litter are feeling tech... err... literate (
), you can achieve the desired effect using Rockbox, an alternative firmware (i.e. the bit of software that controls your MP3 player).
The installation process is reversible if you don't like it, and not actually all that complex - but it perhaps helps if you know your way roughly around a computer. You should know that there is a very small chance of destroying your player by installing it, but it's so small that I think it's fair to say it's reasonable to ignore it completely.
If you'd like more information on this option, we can happily provide it.