How do I bulk edit contact's nicknames to first and last names?

Question

i imported contacts to the contacts app and they all say "NoName".
i click on one of them and the first and last name fields are empty but the nickname field has the first and last name in it.
how can i bulk edit 1120 contacts to change the full nickname to a first and last name?
ex: "First"  ~  "Last"  ~  "Nickname"
       "Blank"  ~  "Blank"  ~  "John Smith"
i want to to be:
       "John"  ~  "Smith"
help me create an applescript or use a program or something cuz its killing me....thanks
ohh and i used both of the following applescripts and nothing happened:
tell application "Address Book"
   set all_Persons to every person in group "Test"
   repeat with per_son in all_Persons
       set nknm to per_son's nickname
       set per_son's first name to word 1 of nknm
       set per_son's last name to word -1 of nknm
   end repeat
end tell
ANDDDDDD
tell application "Address Book"
   set {ASTID, AppleScript's text item delimiters} to {AppleScript's text item delimiters, space}
   repeat with onePerson in (get people whose nickname is not missing value)
       set N to text items of (get nickname of onePerson)
       tell contents of onePerson
           set first name to text items 1 thru -2 of N as text
           set last name to text item -1 of N as text
       end tell
   end repeat
   set AppleScript's text item delimiters to ASTID
end tell
neither did anything...

Answer 1

to any1 that wants to use the scripts and have them work just type "save" on the next like after end tell and itll do it........