You cant but here is a very cheap one = http://www.dealextreme.com/details.dx/sku.11866ONLY TWO DOLLARS!
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I bought 3 - and I attest they're pretty excellent. worked in xp pro student sp3 with no drivers.
Really?I already have a built in one and a usb one.
dealextreme is my new ebay :D (impulse buy addiction)
Yeah mine too
IT would be very hard but YOU CAN'T DO IT!