if it was a decade ago, PXE/tftp booting was pretty common (at MetaCarta we shipped dell 2650/6650 servers around then, and while field upgrades were from DVD, the QA lab had some "synthesize keystrokes through a KVM to select netbooting" and then a tftpserver that had the image you wanted to install in a MAC address specific filename, so the machine picked up the intended image. We got the idea from another boston-area startup (Vanu Inc) that put similar Dell servers in software-configurable cellphone towers, iirc)