Seeing as how CD Drive's don't burn exact copies, you might not be able to update.
Also SPLIT AN OS IN MULTIPLE PIECES, I don't even wanna think about the glitches that would result >.<
My original idea was to get the ISO to you and you mount it in Daemon Tools or sumthin and update an earlier OS, such as 3.1x, 95, 98, NT, Me etc. etc.
It's funny, ME was released after 2000 but 2000 was it's upgrade.