If you have to, you can find a cracked version of Windows on a torrent website so you wont need a license key. If you go this way, you wont be able to get any updates from Microsoft because of the *cough cough* dubious nature of the copy. And thats all Ill tell you about that.

And yes, you need to burn the image to a CD; burning the individual files wont get you anywhere.

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Caress the one, the never fading rain in your heart- the tears of snow-white sorrow.
Caress the one, the hiding amaranth in a land of the daybreak.