Routers / Switches :: Convert 2Wire Router 38000HGV-b As Wireless Access Point?

I just switched over from AT&T Uverse to time Warner cable for Internet. I bought a Motorola Surfboard sbg6580. I have the surfboard hooked up and all is well. Now I would like to do in put the old 2wire from AT&T in a room upstairs and use it as place I can plug in the Ethernet cords and also transmit another signal. I have what's a called plug link that is plugged in down stairs and then another upstairs and it allows the Internet signal to run through the power lines. So it just about the equivalent of running a cord for down stairs to upstairs. So basically I just need to plug more then 1 thing upstairs that isn't wireless and I would also like to transmit a 2.4ghz signal upstairs and use my Motorola to transmit a 5ghz.How would I set up the 2wire to do this.