it didn't work
i downloaded the NTDETECT + ntldr files from Neosmart and pasted them in D: (which is where XP is Installed)
when i try to enter XP i get a msg (NTDETECT failed)
and then i copied the same files from my XP Installation CD and when i click on XP the computer just restarts
and i tried without these files, it asked me to repair windows but in order to repair i need to enter administrator password, which i do not know what it is because i didnt create admin username or password!!!!!!!?
Please read the instructions more carefully. Have a read of the sticky thread.(points 3-5)
Those files are XP files.
They already exist on XP.
You must copy them from XP into the root of your "system" partition. This is probably Vista, but you must check for yourself (point 3)
The one that is the physical boot drive in the BIOS is the one that contains the "active" partition which is actually being used by the primary bootloader. In your case, I suspect your Vista drive is the primary boot device in the BIOS, so the boot files of both systems will need to be placed into the root of the "active" partition (i.e. Vista's partition) of that hard drive.
That screenshot is from my system (as it used to be), and is showing you how to locate the flags and what they mean.
It's not meant for you to copy.
Just locate your own "system" (Vista in your case) and make sure to copy the XP files there.