Yo Zilla,
After further playing around with your mod, one crucial thing that needs to be done is to ensure that the "countries_id" in the country table relates to the country IDs that you've specified in your SQL. The zones will not automatically populate in admin unless this has been done. This issue would be a real concern for people who had countries and zones before this mod.
Besides this is, it works great! Great work on compiling all these countries together.
Best Regards,
Mr.Gadget