Remote Linux installation over the network

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http://serverfault.com – Long story short - I have to remotely install an arbitrary Linux distro on a PC over the network. This is not a server and I will be installing a desktop environment. The problem is I don't have physical access to the machine and it doesn't have a monitor, keyboard or a mouse - so the only help I can get from the guys where the machine is to plug it to the network and turn it on. On top of that the PC is brand new so it doesn't have an existing OS. On the bright side I have root SSH access to a Linux server in the same local network as the PC... How would I go about installing the OS, while (HowTos)