/boot Partition was Deleted! What is the best way to recreate?

My /boot Partition was somehow deleted.
How can I recreate it?
I've been trying to boot from a LiveCD then un-archive the Grub and Kernel26 pkgs from a flash drive.
Then run:
mkinitcpio -c /mnt/sda3/etc/mkinitcpio.conf -k 2.6.31-ARCH -b /mnt/sda3/ -g /mnt/sda3/boot/kernel26.img
Everything seems to work except it fails to detect /dev/sda3.
Error Log:
:: Loding udev.../init: 11: /sbin/udevd: not found
/init: 11: /sbin/udevadm: not found
/init: 11: /sbin/udevadm: not found
Waiting 10 seconds for device /dev/sda3 ...
Root device '/dev/sda3' doesn't exist, attempting to create it
ERROR: Failed to parse block device ids for '/dev/sda3'
ERROR: Unable to detect or create root device '/dev/sda3'
You are being dropped to a recovery shell
And no /dev/* devices show up, except for console, mem, null, and zero.

Hello o/
1) Boot on your live CD
2) Launch fdisk on your boot disk and create a new partition
3) mkfs.ext3 your new partition
mkfs.ext3 /dev/your_boot_partition
4) mount your / partition and /boot
mkdir /mnt/my_system
mount /dev/your_system_partition /mnt/my_system
mount /dev/your_boot_partition /mnt/my_system/boot
5) Chroot into your system :
chroot /mnt/my_system /bin/bash
6) Install grub and kernel26
pacman -S grub kernel26
7) Edit your /mnt/my_system/boot/menu.lst to reflect the change
8) Exit your chroot and umount yours partitions and reboot
Sorry for my english

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