$model->image=CUploadedFile::getInstance($model,'image');
            $model->image->maxWidth = 600;
            $model->image->maxHeight = 300;
            $model->image->thumb = array(
                    'maxWidth' => 200,
                    'maxHeight' => 500,
                    'dir' => 'thumbs',
                    'prefix' => 'asdf_',
                );

            if($model->save())
            {
            $model->image->saveAs(Yii::app()->basePath . '/../images/' . $model->image);
}