I've looked in folder where the default presets are stored and can't see my new one, (CS4>Presets>Curves) are they stored anywhere else?
Thanks
I know of no way to change this.
However, if you move you preset files from that folder to The Photoshop CS4 app folder (Presets/Curves), then restart Photoshop, they'll appear alphabetically in the main list.
They keep the Adobe-made stuff separate from the user-made stuff this way.