if you dont have a network hub. or a network/router combo box. you just need to pick one up. (preferable one with WAN or uplink) put the incomeing broadband into the WAN/uplink, and then theres 4 other ports (usually) just plug PC into one of them PS2 into another. in your case get a long network wire to do cuz its down the hall :P
Anddd
im pretty sure NHL 2030 will be online
But for NHL 2003 which im sure you meant. its just not online for PS2. PC it is.