I think that your last statment is right.
and thinking on this issue, ( never thout of it before) realy makes me want to do it. why, well because if linux can hold a second os install , linux rocks.( of course that rocks but will rock more)
so here is my suggestions:
make a image of one machine. (w2k) use use sisprep or other tool, once the image is done. copy to a samba server.
use a boot disk ( barts boot disk) or if you want get geek try to use pixboot, ( if nic card support it) I know that red hat does it supported.
let us know