Problem:
El cliente quiere usar unos campos genéricos en notificaciones de CRED pero no aparecen en los emails.

Solution:
Campos genéricos no se guardan en el base de datos por defecto, es necesario añadir el opción "persist":1.

Problem:
If I want a select custom field with countries is there some way to import the list of countries rather than have to enter all of the options manually when editing the post field group?

Solution:
Fields such as select dropdowns are stored in a proprietary format as serialised arrays and so the options cannot be readily imported.

It is possible with taxonomies, using a plugin such as BulkPress.

A Toolset user has made modules with ready-made country and state custom fields available here: https://app.box.com/s/hp4apo2547okcq7ma6uj