You'd need to have your laptop on everytime you want to use any of the comps or the PS3...
So yes it's a problem.


By wireless usb modem, it sounds like its a 3G dongle connecting to gsm antennae?
So I guess the comp with a shared connection can't be helped, because no usb2ethernet device will do the trick I think.

To me then, the wireless router will do the job you want, this time with DHCP enabled, no? Never tried that particular combo, so I can't be 100% sure.