source text file processed with regex
source file
http://scorpion.robotz.com/text/Technical/iso_internet_country_codes.txt
used regex to create csv file
:%s/\([A-Z][A-Z]\) \([A-Z][A-Z]\) \([A-Z][A-Z][A-Z]\) \([0-9][0-9][0-9]\) \(.*\)/"\1","\2","\3","\4","\5"/