[ubuntu-uk] dual boot

[norman]

Old nuisance is here again - Happy New Year - I had a sata hdd for
Christmas on to which I installed Win XP Pro having first disconnected
the Ubuntu hdd. Then, with both drives connected I confirmed that the
Ubuntu drive is hd0 and the Windows drive is hd1. At the end of menu.lst
in Grub folder I added at the very end:-

title Windows
map (hd0) (hd1)
map (hd1) (hd0)
rootverify (hd1,hd0)
chainloader 

On starting to boot I pressed esc and, at the bottom of the list, there
was Windows. I am winning I thought so, after selected Windows I pressed
enter and saw what I had entered in menu.lst and an error message:-

Invalid or unsupported executable format.

I seem to have done something wrong and hope that some kind reader can
point me in the right direction, please.

Norman