You might be able to purchase a replacement CD from Microsoft under their service for replacing damaged CDs.
See bottom of page here:-
http://support.microsoft.com/kb/812247
Or another option could be to purchase (or search for something free on the net) software such as Acronis and make an image of your current drive:-
http://www.acronis.com/homecomputing/products/trueimage/
You might find an older version of Acronis, or something similar, given as a freebie with a computer mag.
If your current installation is not too good, you could borrow an XP CD and use your key to make the installation, and then make an image as a stand-by copy.
If you try to copy a Windows CD, I suspect you will run into copyright issues.
See bottom of page here:-
http://support.microsoft.com/kb/812247
Or another option could be to purchase (or search for something free on the net) software such as Acronis and make an image of your current drive:-
http://www.acronis.com/homecomputing/products/trueimage/
You might find an older version of Acronis, or something similar, given as a freebie with a computer mag.
If your current installation is not too good, you could borrow an XP CD and use your key to make the installation, and then make an image as a stand-by copy.
If you try to copy a Windows CD, I suspect you will run into copyright issues.
