Avoid apple setup agent

Avoid apple setup agent in Mac OS X Leopard 10.5 (on OSX86)

1. start OS X in the single user mode (e.g. using -s flag at boot)
   
2. mount file system as mentioned in boot messages
   
3. change root password passwd root
   
4. create the .AppleSetupDone file with touch /var/db/.AppleSetupDone
   

via InsanelyMac