How to sync OS Leopard address book with your Google contact

After many trials, I found the good way to sync the address book in
leopard with google contact from this link posted by "mshik":
http://www.google.com/support/forum/p/Google%20Mobile/thread?tid=69dae97a4171354b&hl=en

Just open terminal and write down this:
/System/Library/PrivateFrameworks/GoogleContactSync.framework/Versions/
A/Resources/gconsync --sync gconclid --register 1 --username XXXXX@XXXXXXX.com
--password PASSWORD --syncmode fast

Change the XXXXX@XXXXXX.com with your gmail account for example: abcd@gmail.com
and change the PASSWORD with your password.
This is the fastest way to sync my iBook G4 OS Leopard to google
contact.