Wireless Card For Ps3 PS3 Wireless Upgrade? Add WiFi To The 20GB Model With An Internal Card?

PS3 wireless upgrade? Add WiFi to the 20GB model with an internal card? - wireless card for ps3

I have a PS3 20 GB original, w / o the wireless card. If I add the map of wireless devices is, my system automatically recognizes and 20GB and 60GB models are quite different? I think Sony has the WiFi and card reader to pricing issues and consultancy believes are the same. Is that correct?

All the advice I can offer is greatly appreciated. I want to upgrade my 20GB capacity have wifi ... if possible.

Thank you,
James