your probly better off hooking it up to one machine and configuring it as a netework share to the other machines. It is possible to have it as a stand alone device on the network but this, like you mentioned stops scanning and faxing ability, you may want to check out any and all info about setting up Upnp network aware printers for domains, also check that the firmware of your router can handle Upnp devices and all that goodens. For me, the best bet is to setup your home network on it's own subnet, different than the WAN if you are getting internet through your dlink* Then share the printer from the PC that you will be scanning and faxing from.

*reason to use a different subnet on your LAN than the WAN, is to prevent WAN solicitations from being able to sniff your printer share.