I forgot the name of the utility that does this. I know there is one. I use to work with the network administrator and he would load client disks into each PC that needed WIndows installed. On the main computer that has the image, he would flood the network in that room (or at least the PCs that are connected to the switch the imaged computer is on). We would manually reboot the PC with the client disk in there and it will start the imaging process. It even has the status bar and everything. Can't think of the name though, but it's really handy and convienent.
Kind of like a Norton Ghost pushed over to the Client ends through network. The problem with image is that we have to go to each PC manually and change the name and IP so there will be no conflicts upon boot. You know what, Norton Ghost probably has a version that does this. Multi client installs over a network using an image you havel.
Here is older website that has a similar action to what you are taking: