Programmatically create presets

Is it possible to programmatically create imagecache presets? I am creating a module that will grab images remotely, scale/crop them, and then display them to the user. I will be using imagecache to do the scaling/cropping, so the imagecache module will be a dependency for my module. I would like to set it up so that my module automatically creates the imagecache preset that it will use to scale/crop the images if possible, instead of having to go in and manually set the sizes in the imagecache admin interface. Is this possible?