Slightly different problem to the usual GRUB dual boots on the forum.
I have 2 HDs in a test machine here, the secondary partition currently has Fedora Core 1 installed on it with some toys I am playing with. This HD happily boots if
the BIOS is set to boot from D.
On the primary partition I have just installed Fedora Core 2 test 3. This also happily boots up, but only if I select C as primary in the BIOS.
I have tried editing grub.conf to list Core 1 (hd1,0), but obviously something is wrong with that (I'm guessing the fact that I need more root structure than is in the default settings)
Grub.conf as follows