you could try it, it couldn't hurt. I don't have an adapter yet, probably won't get one b/c my dad is real anal about that. Plus, I havn't had the time lately. I don't see why you would NEED a router, but routers are the best idea b/c you don't have to keep on reconnecting the modem to a new device. Plus, it'll let you use both computer and PS2 online at the same time.