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No need to hi jack the thread but it's a very similar question.

I have an Airport Extreme and an older b/g Airport Express. I have 3 other roommates all who have N capability except one, who is using a PowerBook G4 as well as my iPhone. Currently we have our Xbox 360 connected directly to the Extreme. Could I create a dual band network and run the 360 on the Express as well as having wireless (b/g) for the PowerBook and my iPhone? I as well want to be able to control iTunes through the remote app. Is all this possible? Any info/help would be great. Thanks
 
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