Expand ip's for an Ambit 60740EUW - hidden menu?

I have an Ambit 60740EUW wireless router and it only allows 4 ip's. I've gotten into the configuration and there is no menu area to specify the range of ip's for the router to use. After adding a wireless printer or two the number of ips get rare.

Is there a hidden menu or a way to turn up this option?

It might be TimeWarners way to keep the number of users down to a minimum.

Thanks

Dave