Hey Sony311, great tip!!
It worked for me on FW 1.1.2, but when I tried to restore my backup to FW 1.1.4 didn't work... after a little time I discovered that the files need to be in the following path:
/private/var/mobile/Library/... instead of
/private/var/root/Library/...
i.e.
AddressBook is into:
/private/var/root/Library/AddressBook
now (1.1.4, and I believe in 1.1.3 too)
/private/var/mobile/Library/AddressBook
and through the WinSCP, for example, just drop and copy your backup
For the contact list, you need to reboot your iPhone.
I hope to help somebody
see u!