It's kind of a hassle, but with Norton Ghost you can create a network bootflop. This way you can still logon to the network to place your image onto one of the other workstations. There are also lots of other bootfloppies to boot from a floppy and still be able to logon to the network.
www.bootflop.com isn't such a bad idea. Also, I believe one the nin1 CD's has such a feature on it (Bart's network flop) but I can't remember witch one, it's one of the latest though.
The easiest way is of course to first put your image onto a second hardisk or partition, boot Windows again and then copy the image to the network. But, this requires a second drive or partition.
Hope this was what you were looking for Bads 1