Like Grommit, I inherited our range, 192.168.0.x with a mask of 255.255.255.0. This was already set up and has a couple of addresses NAT'd through our firewall to the Segfl router, thence to Easynet's network. When we ran out of IPs, I changed this to 255.255.248.0 to give us more space. It works fine, the only problem I had was with two 3com WAPs which refused to accept the new mask, but a firmware upgrade to the latest 3com release solved it. It sounds like you have a similar setup, Grommit, so this may be a solution you can use.