Ghost 14 running from an external harddrive

I am attempting to install and use Norton Ghost 14 from an external hard drive.  The reason for this is I have a small home network and would like to centrally locate the software rather than install on all machines.  I have seen that the corporate version can do this, but with three machines hooked to some central storage I didn’t think that was necessary.  I seemed to have missed any hint at being able to run it like this in the install manual.  So maybe I just didn’t see it or it cannot be done.  Either way thanks for any input and light that can be shed on this.