Hello, There!

I have this imac g3 that I don't use anymore, but i found a use for it. I want to connect my PS2(Playstaion 2) to it, so I can play online. Here's The Catch: Since as this iMac doesn't have an airport card, i used my Belkin Wireless G Adapter to connect to my wireless router my girlfriend and I share. Now, I was wondering if i could plug my PS2 into my iMac Via Ethernet. If So, how is this done? If Not, What Would I Need To Do This?

Thanks In Advance!