I have a custom content type and I've set up replacing URLs automatically correctly. This is teste as working when using the Drupal provided content creation form (/node/add/custom_content_type). However one field needs to be set programmatically, so I've created a custom form that creates and saves this content type, but I don't know how to invoke the URL formatter/replacer using the custom form. Some documentation on how to use this module with custom forms would be helpful.