1) First plug the wireless router from the wall socket. The wire connecting from the wall to the router must be a different LAN cable then the one Powercom give to you (Powercom give you the inserts with 8 thin wires you need to buy one with 4 wires). Also you should plug into the one says LAN in your wireless router.
2) Connect the Powercom cable from your computer's LAN card and plug the other end into the wireless router in one of the ports (Normally there are 4).
3) Now the router should work you will need to go to the Brand's website to change all the settings and security. I think the Linksys or D-Link are the easiest to use.