Boot loader erased Windows Vista

I have made a mistake and I have erase some system files, and now I'm unable to load the operating system.

Hopefully I have found this on Microsoft support : http://support.microsoft.com/kb/919529.

This solution can be applied very fast when you boot from the Vista media when you choose "Repair my computer", and for a "command prompt"

bootsect /nt60 /all is a magic command.