GRUB menu.lst (chainloader) - help needed

[MrMagic]

Thanks for everyones help so far. I haven't managed to resolve this yet but I am about to try muha's advice when I work out what mapping does! I toyed with it yesterday but I can't understand why mapping the drives over would help i.e. why not just point to the correct disk to start with or do I miss the point?

[MrMagic]

Thank muha! I turns out that grub is on my IDE drive (I noticed after I unplugged my linux sata and I get a grub error). How much of a plonker do I feel. Anyhow:

map (hd0) (hd1)
map (hd1) (hd0)
unhide (hd1,0)
hide (hd0,0)
rootnoverify (hd1,0)
chainloader +1
makeactive

This works. Thanks everyone for advice! I fund nerdellos guide which is a great resource:
www.linuxforums.org/forum/linux-tutorials-howtos-reference-material/9398-solving-boot-problems-grub-2nd-edition.htm

[budman7]

I can't understand why mapping the drives over would help i.e. why not just point to the correct disk to start with or do I miss the point?

MS doesn't take into account that there are other OS's out there.
So they believe that Windows must be on the first hard disk.
The map tool makes windows think that it is on the first hard disk.

[muha]

good to hear it worked!