bootmanager after re installing xp

Hello, I have installed Vista and XP in a multiboot configuration on my system.
Now I had to re-install my Windows XP. Afterwards the Vista Bootmanager was gone - XP is starting directly - so I am not able to boot into Vista anymore. I have alredy tried to repair the bootmanger with the Vista Installation DVD - without success.
So, does anybody know how I can get the Vista bootmanager back and start my Vista again?
Thanks for any help mvol

Hello, I have installed Vista and XP in a multiboot configuration on my system.
Now I had to re-install my Windows XP. Afterwards the Vista Bootmanager was gone - XP is starting directly - so I am not able to boot into Vista anymore. I have alredy tried to repair the bootmanger with the Vista Installation DVD - without success.
So, does anybody know how I can get the Vista bootmanager back and start my Vista again?
Thanks for any help mvol