[CentOS] server fails to boot GRUB and flashing cursor

I have a power edge with raid5 that contains Centos 5.4.
I had a drive failure, anyway the array is optimal now but the server 
won't boot.
I can boot from a Centos 5.3 liveCD and all the data is still there.

There is no grub.conf just shows a broken link.
Is fixing this as simple as gub-install |--root-directory=/mnt/disc/sda3 
/dev/sda|

Before screwing things up I am seeking your all's advice.
Thanks in advance
Dan

# fdisk -l /dev/sda

Disk /dev/sda: 72.7 GB, 72729231360 bytes
255 heads, 63 sectors/track, 8842 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          13      104391   83  Linux
/dev/sda2              14         658     5180962+  82  Linux swap / Solaris
/dev/sda3             659        8842    65737980   83  Linux



-- 
Dan Carl
651-766-2800 x218
651-491-9712 Mobile