Man, I really feel for you. :sad:
You might try to find someone with a similar Sony Vaio running on Windows XP and borrow their Windows Install Disk. Then upgrade to your own copy of Windows XP after you get it running with the OEM software. But you may need to contact Sony and see if you can get the drivers for running your Vaio laptop on Windows XP.
Even though Microsoft says that you can legally downgrade your operating system, many have tried and failed. Manufacturers have been discouraged by Microsoft from writing the required drivers to run the disk drives, video cards, sound cards, etc. on the new computers with Windows XP. Without a committed assistance from the computer manufacturer to make the necessary XP drivers available so that XP will run correctly, you'll probably be SOL.
Microsoft has decided that they will no longer allow OEM sales of Windows XP after June 30, 2008 unless the computer is one of those Ultra Low-Cost PCs which will be allowed to be sold with a stripped down version of Windows XP Home Edition until June 30, 2010.
As far as I have been able to determine, Dell is about the only major manufacturer that still builds some of their computers with Windows XP Home and XP Professional. This is the reason I just purchased two new computers from Dell (a new desktop and a new laptop).
BTW - I spoke with Microsoft yesterday and they confirmed that the Direct OEM and Retail License Availability end date is June 30, 2008 and the System Builder License Availability end date is January 1, 2009.
See Here (scroll down to
License Availability Roadmap)
http://www.microsoft.com/windows/lifecycle/default.mspx
Windows Vista is JUNK and most large corporations are refusing to run it in their networks. It is a nightmare to use it in any kind of network, especially small home-office networks that do not have large IT staff to support their PCs. One of the PC publications recently uncovered several internal Microsoft memos stating that Vista was NOT ready for public release, but Gates went ahead with it anyways.
Sales of Windows Vista are way below Microsoft's expectations. So they are going to fix it by pulling Windows XP from the market.
Let us know how you come out.