This method works for the TG585v7 router. Changing the DHCP pool range can be accomplished via the config file, but you do need to be logged in as SuperUser. First, go to O2 wireless box II on the lefthand menu, then select "configuration". At the bottom of the page, you'll see an option to Save or Restore Configuration under Pick a Task. Select this option and save your current config. The default saved name is "user.ini" and you can select a place to save this to suit yourself. Next, rename the saved file to something more sensible, like "fallback.ini". Open the file with a simple text editor, (like notepad), which won't alter the formatting. Before doing anything else, save again under another name, like "try01.txt". You'll find the DHCP pool start and finish points under dhcs.ini within the file. Change these as per your preference and save the file. The entries for 192.168.1.254 show up in several places, so best to use a search from the start of the file and modify every instance to 192.168.1.1 as you find them. Save the complete file and rename it to "try01.ini" Go back into the web interface for the router and call in the file you just created from the Save or Restore Configuration dialog. When the box re-starts, you should have to release and renew your connection to it if things have worked properly and you should be able to login at 192.168.1.1. Using this method preserves all your other settings for wireless and security etc. and allows you to recall everything if you ever have to use the factory reset without the misery of typing it all back in again. I know this works, as I've just done it myself and it's all fine now. I don't believe this method creates any security holes, but I can't vouch for that with any certainty. Maybe others could enlighten me if it does. I can't understand why you don't appear to have SuperUser though. Maybe a full reset of the box might restore it?