Game Port To Usb Adaptor Im Having Trouble With Rock Band For The Wii. HELP!!!!?

Im having trouble with rock band for the wii. HELP!!!!? - game port to usb adaptor

ok, in a party in September for the new game Rock Band The Beatles, and I've never been rock band. equipment in gettng and I found that they all have a USB port, also use the radio. the thing is that it has 4 Insrument and the Wii only 2 USB ports.

So my P. As you can play all 4 people on both the Wii? I know you can do, because I've seen 4 people play Rock Band on the Wii.

What people use them. multiple USB adapter or what? plz help.