a while back i followed a post made about removing countries from zen cart the post was....

If you'll never want to sell outside the US, the easiest way is probably to back up your database, then run this in Admin - Tools - Install SQL Patches :

DELETE from countries WHERE countries_iso_code_3 NOT IN('USA');

That will remove all countries except USA. Then go to Admin - Locations/Taxes - Zones and manually remove Alaska and Hawaii (and some others like Puerto Rico), depending if you want to sell there.

You could also set up a US-only shipping zone, but I don't think that will stop people from outside the US from creating accounts.
I altered the .sql to say GBR instead of USA.
I am wondering is there anyway to reverse this?
i have upgraded to the most recent zen version and installed a new payment module, now google checkout is giving me an error from the integration console saying "the cart was posted with an unrecognised country code" I can only assume it to be this that is causing the problem, i did have a coder that had made google checkout work for me before via an express checkout button but i can unfortunatly no longer get in touch with this person.
Any help would be greatly appreciated.