http://serverfault.com/questions/27428/how-to-add-one-module-to-initrd-using-mkinitrd

http://www.mail-archive.com/fedora-package-announce@redhat.com/msg21104.html

http://www.justlinux.com/forum/showthread.php?p=886204

• Server dies and needs to be replaced in a hurry.
• Hard drive(s) has been moved to new computer hardware, but won't boot.

Boot the new computer from the appropriate install CD/DVD.

1. Choose Rescue mode
2. Skip networking
3. Mount the filesystem under /mnt/sysimage

Adjust the following AHCI driver example for your needs and your kernel:

chroot /mnt/sysimage
cp /boot/initrd-2.26.27.24-78.2.53-fc9.x86_64.img /boot/initrd-2.26.27.24-78.2.53-fc9.x86_64.old
mkinitrd --preload ahci -f /boot/initrd-2.26.27.24-78.2.53-fc9.x86_64.img 2.26.27.24-78.2.53-fc9.x86_64

Exit and reboot the system.