Boot and Partitions, ntldr.exe missing

I have a hd that is 9 giga. I THOUGHT that I could install windows 2000 in it, after that use partition magic to resize the disk and create a partition that was 2g so that I could install Winnt in it. The idea was that whenever I wanted to use winnt I could just use partition magic to change the Set Active from winxp to winnt and vice versa. When I do that and I try to use nt the box says, missing ntldr.exe, I have done some google search and some people mention that I could copy that file from the cd or disk and put into c:, this was not possible since I couldnt find any file with that name in the whole cd. Now I just went to the partition magic again and set the winxp partition active, winxp started with no problems.

Any ideas.
Carnudo