Fix linux booting when moving hard drive to another motherboard

Linux uses initrd image ( initial ram drive ) to startup the system.
The image file is located under (/boot/initrd-(kernel version).img)
if this image is not compatible with the current hardware, then we need to create a new one under the same hardware devices.
All we need is Fedora installation disk 1 to boot up in a "rescue mode" and do the follow:
- chroot /mnt/sysimage
- mkinitrd initrd_new-(kernel version, use the latest number, it can also be found under /lib/module/) (kernel version)
i.e. : mkinitrd /boot/initrd_new-2.4.18-0.12.img 2.4.18-0.12
- vi /boot/grub/menu.ls
- replace the current initrd file name with the newly created one
- exit then exit to reboot the system