found this online
Making a Nation's continent editable
This has already been described, I think by IJ, but I'll include it nonetheless, as you might otherwise forget about it or start looking, while it is available right here.
1. From the base working location go into the "/database" folder.
2. Open a file called: nation (XML file)
3. Scroll down until you see the line <!-- Continent -->.
4. Look for the following line below <!-- Continent -->:
<boolean id="is_read_only" value="true"/>
Note: The statement 'true' in this case means that it acknowledges that the continent value in the nation form is read only and thus cannot be changed.
5. Now change the 'true' statement in the is_read_only line to 'false'.
6. Save the file, close it and restart your editor.
7. You are now able to edit a nation's continent.
---------- Post added at 05:07 PM ---------- Previous post was at 05:05 PM ----------
Sorry, copied wrong bit of text, it's on here somewhere
http://www.thedugout.tv/community/showthread.php?t=72801