I was at Staples last night and saw Windows XP Pro upgrade for $179.95. I had a $30.00 coupon which would have put the product down to $149.95. I started to buy it because I want to be able to access my computer from remote sites. My question is. After I looked on the package I did not find any info stating that this product would would if you already had Windows XP Home Edition on your computer. All the other operating systems except Windows 95 were listed but not Windows XP Home Edition. What's the deal?