as per SAP's documentation located at http://help.sap.com/erp2005_ehp_04/helpdata/en/9f/f8457c1d9e417bbe424fcbe1e7f84d/content.htm
I should make settings in Customizing for Personnel Management by choosing Employee Self-Service -> Service-Specific Settings > Personal Information > Foreign Address Settings > Determine Countries for Foreign Address and Make Settings. and
Personnel Management->Employee Self-Service->Service-Specific Settings->Personal Information->Foreign Address Settings -> Specify Countries for Foreign Address Entry.
but I cannot find these IMG nodes in my ECC6.04 system.