1. Download the Clonezilla and burn to CD or USB stick.
2. Boot two computers with the needed hard drives with the Clonezilla image.
3. On the source computer follow the steps and select the copy over network from this source computer.
4. During the final steps, the Clonezilla will write on the console what commands should be executed on the target machine.
5. Go to the console on the target machine and execute the needed commands. After a few questions, the cloning will start. Yuppee!