// CREATE A PRESET IMAGECACHE
$imagecachepreset = imagecache_preset_save(array('presetname' => 'PRESET_NAME'));
// Action
$imagecacheaction = new stdClass ();
$imagecacheaction->presetid = $imagecachepreset['presetid'];
$imagecacheaction->module = 'imagecache';
$imagecacheaction->action = 'imagecache_scale_and_crop';
$imagecacheaction->data = array('width' => '200', 'height' => '200' );