This will build a Zone Definition for all countries except the USA ... you can use the SQL in phpMyAdmin for this ...
Code:
INSERT INTO geo_zones (geo_zone_id, geo_zone_name, geo_zone_description, last_modified, date_added)
VALUES (40, 'International', 'All Countries Except United States', NULL, CURDATE());
INSERT INTO zones_to_geo_zones (zone_country_id, zone_id, geo_zone_id, date_added)
SELECT countries_id , 0, 40, CURDATE()
FROM countries
WHERE countries_iso_code_3 NOT IN ('USA');
Then, you can remove/add the minor adjustments as needed ...
NOTE: on Zone Definitions there are some Countries/States that have 2 definitions for use with USPS and UPS such as Puerto Rico where there is Puerto Rico the Country and Puerto Rico a State of the United States ...