This contribution is based on the zones.php module from the 2.2MS2 milestone. It does the following 3 things:
1. Creates a secondary zone-based shipping method for express shipping (or whatever you need)
2. Price or weight based zone shipping
3. Allows you to specify a name for each shipping method that is viewed during checkout. (ie. Fedex Ground, USPS Global Priority)
To put it simply this contribution allows you to offer regular and express shipping for each zone, ie. UPS Ground and UPS 2-day Air for the United States, International ground and International express for Canada, Regular and Express for International, and so on for as many contries/zones as you like.
this contribution alters zones.php and creates a new zones2.php. If you need 3 different zone options you could create a new zones3.php and with a quick search and replace be up and running.
This contribibution is similar to 'dual zones shipping' but that one is outdated I believe.