I don't believe that's correct... Sometimes Vista's bootloader fvcks up for me and then when I select XP, it will tell me NTLDR is missing... what the problem was, was that Vista simply didn't reference my XP partition properly, so I went into Vista and fixed up its pathetic bootloader so it referred to the right partition. Voila!
If you have NTLDR problems, probably your boot manager is really fvcked up. The link you showed is probably someone running unstable components (hence 1 stick, bios flash, etc etc)