Pour faire une install directement sans toucher à la machine à install, regarde plustot du coté du packet FAI ( à installer sur une machine serveur )
$ apt-cache show fai
[..]
Description: Fully Automatic Installation
FAI is a non-interactive system to install a Debian GNU/Linux operating
system unattended on a PC cluster. You can take one or more virgin
PCs, turn on the power, and after a few minutes, Linux is installed,
configured, and running on the whole cluster, without any interaction
necessary. Homepage: http://www.informatik.uni-koeln.de/fai
A+