Setting up wireless router

I have a network router in place but not wireless, should I remove that router first and then set up the wireless router? I want the laptop wireless and a desk top wired.

I need to set up my wireless router. I have a dsl connection through the modem provided by comp. when looking at the modem I see the obvious 1) power 2 )ethernet 3) phone now the ethernet is running from my comp to modem. the router also uses ethernet but the modem only has the 1 ethernet port.