Ok so my grandparents have a Windows XP computer and have a comcast modem its a motorola surfboard sb5 101 and on the back it has 1 ethernet plugin and 3 other plugins like power but their not ethernet and i have a xbox 360 adapter (the black one) and i was wondering if you can hook up xbox live oh ya and i have a Netgear WGR614 V9 router. any help would be great Thanks!