Don't need a CD for Wireless router. Just google the Default IP along with login n password. you can configure it via your computer. Does this have DDNS/DynDns?
You probably do if it came with a cd, mine did and the cd had pc software for setting the encryption type that it used such as wep or wpa and the password.
Linksys gateway provides Dynamic Domain Name System (DDNS) feature that allows users to access their gateway remotely. This feature allows you to assign a fixed domain name to a dynamic Internet IP address. It is useful when you are hosting your own website, FTP server, or other servers behind the gateway. NOTE: To use the DDNS feature of your router, begin by signing up with a DDNS provider such as www.dyndns.org or www.TZO.com. Linksys routers only support DynDNS and TZO DDNS service providers.