I need to install XP Pro on either my ASRock Z77 Extreme4 based machine or my Asus M4A89GTD Pro machine. I understand that it will require creating an install CD with Se4rvice pack 3 slipstreamed in. I just realized I seem to have lost the only XP Pro full install CD and only have XP Pro Upgrade CDs (along with CDs for NT, 2000 PRO etc, to use as the underlying OS for the upgrade). Is it possible for me to create a slipstreamed CD(which includes SP 3) from the upgrade CD ? Or is there any other way that I can install XP Pro on either of the MOBOs I mentioned above? Thanks in advance for any advice or other help anyone can give me.