Is there any way to add a field to all categories without modyfing them one by one?

For example:

I've created 3 New Fields with MultiField Geo

1)Country
2)State
3)City

How can I add in one shot these new fields to every category?

Trought MySQL? If yes how?

I Acually have to add these 3 Fields and with 100 Car Brands (Categories) It takes quite a lot manually.

And also......

Is there any way to import in one shot all Keywords and Meta Data? I dont know.. trought and XLS file

Thx!