How to install grub2 on a sdb?

[Maryam]

Hi!
my  system has 2 hard, sda & sdb., sdb is my second hard, i replace grub2 with grub-0.97 in fedora 8, and build ISO with new grub, i install fedora on a first hard(sda), it is successful, but when i install it on a sdb grub2 don't  load, beacuse it just install on a sdb
please tell me how to install grub2 in a first hard while my iso on a second hard?
when install fedora with grub-0.97 on a sdb it will load, beacuse it is installed on a sda