How do I fix randomly moved chunks after a crash?

I was stupid and didn't keep a backup of my Minecraft server. Now, it crashed, biomes changed, chunks were moved around, part of my city of gone, an underground chunk was moved aboveground, is there ANY way I can fix this?

I.E. easily move chunks and change biomes.

They were moved because the map files got corrupt so it reads chunks in an out of place order.

It's like 1 2 3 4 5 6 7 8 9 would turn into 1 0 4 6 7 8 9 0 0, where 0 would be unreadable thus deleted.

Picking a known map editor should allow you to move chunks, they include terrain/forest generators.

And set up an automated back-up solution...

For anyone still looking for a fix:

1. Download and open Mcedit
2. Open your world using this program.
3. Do Ctrl+I
4. Click fix regions.

1. Backup your world by copying the folder (either in operating system users folder or wherever you keep your minecraft server executables).
2. Close Minecraft single player game or server to avoid world corruption.
3. Download and open MCedit 1.3 (at the time of this writing, MCedit 2.0 alpha is not in good shape).
4. Open your world in MCedit.
5. Select problem chunks and DELETE them. They'll respawn in their original state when you log onto the world again.
6. Once you're sure you've deleted those problem chunks (and only those), save & exit.
7. Start your server / single player game up again. You should be ready to roll.