Probably not. But what I'm unclear about here is what is actually happening. If you rebuilt the system with the XP install Disc that failed and then you used the Vista Downgrade DVD and that finished the system should be running.
If the XP Repair didn't work but the Vista Repair did I'm unclear on how you know that the Vista DVD finished the Repair as it couldn't have.
As for accessing the Win.Exe this will not be there if you started to do a repair of the system this deletes a lot of the Windows Files and reinstalls them from the Install Disc so if the process isn't finished there is nothing to access on the HDD.
Even still I'm unsure just why the XP Repair Failed as it would have attempted to remove most of the Vista Files and then set about replacing these deleted files with the XP Files. That should have worked provided that you used the XP Product Key and loaded XP.
Even if this failed to finish and you restarted the system and used the Vista DVD that should have deleted the XP Files that where scheduled to run.
Anyway you most likely need to wipe the HDD now with a product like Boot & Nuke available here to download.
http://www.dban.org/download
Aftr you wipe the HDD you can install Vista without needing to install XP First. You just need to insert the Vista Upgrade DVD boot off it and when asked remove it insert the XP Install Disc press enter and wait till you are prompted to replace the Vista DVD. After this it is a normal Vista Install of the system with the added advantage of none of the junk being left on the system from XP like what happens with all Windows Upgrade Installs.
If you need to recover Data off this HDD you need to pull the HDD from the system fit it to a USB Caddy and connect to another system where you can save your Data then you can wipe the HDD.
Col
