Repairing GRUB UEFI Dual Boot Debian 7.1 x64 and Windows 8 x64

Accidentally I failed to install AMD Catalyst 13.6 beta on my Debian 7.1 x64, and I lost my GNOME. For short, I can't recover my GNOME and I reinstall my Debian 7.1 without EFI mood  (my mistake). The Installer can not detect EFI and the only option to install bootstrap loader is MBR.

I can not start both my Debian and Windows. From Bios, I start boot via EFI DVD to start Debian CD Installer. I choose Advanced Option to fix bootstrap location from MBR to EFI Partition (System Reserved), and follow these step:

1. Update your Debian and run
   # apt-get install grub-efi-amd64
   This command will remove grub package, and choose yes
2. Configure your GRUB using this command
   # modprobe dm-mod
   # grub-install
3. Apply your new grub into EFI Partition
   # update-grub
4. This procedure only fix boot into Debian. To create boot option to load Windows 8 boot manager you need UUID for EFI partition by running
   # blkid
   write down UUID for EFI Partition (it may be label as "System Reserved") with size about 100M-130M.
   for my case UUID is 4842-E4F1
5. edit file /etc/grub.d/40_custom and at the end of file add
        menuentry "Microsoft Windows 8" {
          insmod part_gpt
          insmod fat
          insmod search_fs_uuid
          insmod chain
          search --fs-uuid --no-floppy --set=root 4842-E4F1
          chainloader (${root})/EFI/Microsoft/Boot/bootmgfw.efi
        }
   the file becomes like this:
        #!/bin/sh
        exec tail -n +3 $0
        # This file provides an easy way to add custom menu entries.  Simply type the
        # menu entries you want to add after this comment.  Be careful not to change
        # the 'exec tail' line above.
        menuentry "Microsoft Windows 8" {
          insmod part_gpt
          insmod fat
          insmod search_fs_uuid
          insmod chain
          search --fs-uuid --no-floppy --set=root 4842-E4F1
          chainloader (${root})/EFI/Microsoft/Boot/bootmgfw.efi
        }
6. reinstall and reconfigure your grub by issuing :
   # grub-install
   # update-grub

Done, now I have GRUB to my Debian and option to load Windows 8 Boot Manager