Doh ! Installed FBSD5.0 and no more dual boot

[lukek]

Hi,
I have done something pretty silly and not sure now how to recover. I
installed 5.0 release on my desktop which was primarily a Win2k machine and
now there is no option to dual boot. Well there is but when I choose the F1
??? option instead of booting win2k is give me a message telling me that
NTLDR cannot be found.

Can anyone shed any light on a work around for this. I am truly stumped.

Thanks

LukeK