Manager Layout

[moshe]

Hi,

1. Is there a manager layout for "Contact"?And can the same be customized??
2. Can we add our own checkboxes to manger layouts which doesn't have a Remark or refernce qualifier field associated with it(ex:Service providers doesn't have Remark/Refnum)?
3. Can we add our own radio buttons to manager layout?

Regards,

Moshe