Hi All, I am starting my MCSE studies today as my MS press books have come through the post

Anyways, on the installation part, and reading about Networking installation. Now for this to be possible, a copy of windows (ie 95/98/ME/nt etc etc) has to be installed already? Am I correct, or can a network installation be done on a completely uninstalled system, ie a blank hdd?
Just puzzled me, thats all.