windows XP and Vista

I installed a dual boot but now I cannot use XP, I used EasyBCD to try to repair but it did not work, I seem to be missing the NTLDR or it became corrupt when I went and got the three files including NTLDR and did an attrib I find even if I unhide using the -s -r -h format I cannot port over the corrupt NTLDR can anyone help, I sure could use my copy of xp
as an afterthough I cannot use the windows xp to get to the c drive but I can see all my files
thanks for any help
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