Ok so my main computer is hooked up to a modem, and now my son wants a computer up in his room with internet also. So what do I do?
I know you need a wireless router and hook up your modem to it?
I am very confused how do I connect my modem to the wireless router?
and how to I get sons computer connected to it?

I found this on ebay would this work? also if it does then how to I use it?
http://cgi.ebay.com/BRAND-NEW-SEALED-TRENDNET-WIRELESS-ROUTER-AND-USB-CARD_W0QQitemZ150317834859QQcmdZViewItemQQptZCOMP_ EN_Routers?hash=item150317834859&_trksid=p3286.c0. m14&_trkparms=72%3A1205|66%3A2|65%3A12|39%3A1|240% 3A1318|301%3A1|293%3A1|294%3A50