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YOU PRESS THE BUTTON THAT DOES THAT STUFF.
Idk, my mother got a Mac and I want one really bad but I no has one.
So, I really can't help you.
But I can tell you that you got the coolest computer in the world o.o
MSN on iChat? Just download MSN. I never use iChat- just MSN. .. yeah, I don't really understand what you're trying to get at.