Check if the Linksys wireless router is compatible with the ZyXEL Modem/Router as a wireless repeater. I wound up using a wireless repeater to provide coverage in one area in my previous residence. No CAT 5 cables were required. In another area I used Homeplug adapters to extend the signal to a wireless router used as an access point, rather then install a CAT 5 Cable. You can use your Linksys router via CAT 5 cable or Homeplug networking device if it cannot be used as a repeater. Just set it to a different channel than the ZyXEL Gateway. Recommend using channels 1, 6, 11.