So, i got this error up on my system.

Fully encrypted with luks. No way to open the OS. But after doing a bit of searching and, 3AM messing around, i managed to fix it. Im not sure how i did it, but i did. These are the step i took....if you can clean it up a bit please do.

PHP Code:
1.    Boot up live cd, and log into startx 
2.    apt-get update
3.    apt-get instal hashalot lvm2
4.    cryptsetup luksOpen /dev/[your logical partition] pvcrypt 
5.    Execute (in the SAME terminal):
  a.    mkdir /mnt/backtrack5
  b.    mount /dev/mapper/vg-root /mnt/backtrack5
  c.    mount /dev/sdb1 /mnt/backtrack5/boot
  d.    chroot /mnt/backtrack5
  e.    mount -t proc proc /proc
  f.    mount -t sysfs sys /sys
  g.    apt-get update
  h.    apt-get install hashalot lvm2
6.    Navigate through file browser to “/mnt/backtrack5/etc/crypttab” and open in text editor
7.    You are now editing a file. Add the following:
  a.    pvcrypt /dev/sdX2 none luks
  b.    /dev/sdX2 should be the encrypted partition
8.    Quit vi (:wq) and execute:
  a.    Navigate in file browser to “/mnt/backtrack5/etc/fstab” and open in text editor
  b.    Change the line about the root partition (the only line with "/" in it. NOT /boot!), make it: "/dev/mapper/vg-root / ext4 defaults 0 1"
9.    Execute:
  a.    cd ~
  b.    wget http://www.infosecramblings.com/cryptroot.patch
  c.    patch -u /usr/share/initramfs-tools/scripts/local-top/cryptroot ./cryptroot.patch
  d.    apt-get update
  e.    apt-get upgrade
  f.    apt-get dist-upgrade
  g.    chroot /mnt/backtrack5
  h.    update-initramfs -k all –u 

That should be it. A few of these steps may not be required. I am not a linux genius, but i am good at searching google for the answer....After a while checking i found this, and managed to get my encrypted install working again. If you can bugcheck this and trim it down, please do.
Just make sure you tell us so we can benefit