For some reason the noise is extremely quiet and heat is not an issue.

All machines have plenty of space and are well ventilated though.

My friend had some kind of Linux Cloning Program in his CD Wallet - its called Clonezilla.

Since I had 4 identical size hard disks, I installed and updated XP on one machine, then did a hdd copy, put the copie hard disk in machine 2, changed its machine name, copied 1 -> 3 then did the same thing.