Hey man, i play on my macbook pro in windows. Basically very simple: installed win7, booted into it, and the most important part is the drivers. In Lion, when you install windows 7 it will ask you if you want to download bootcamp drivers, in snow leopard you can just use your OS X install discs. AFter windows is installed, boot into windows, insert the disk, and install all the drivers for your computer. This is probably why your friend can't get internet. If he's already done this, and still can't, maybe he needs to get the ethernet drivers manually.
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