http://www.mediafire.com/file/9q77m39tb6rugvx/tut.zip
1. Run the open cmd.bat file
2. Put your nand_dsi.bin file into this folder
3. Type the command from the "twl command.txt" file into the cmd prompt
4. Open the "download this.txt" file and goto the link in it
5. Download the program from the link
6. I cant give exact instructions on how to use OSFMount, but I will try,
7. Open OSFMount and click Mount New...
8. Select the image file generated from the command you ran earlier
9. Uncheck the box that says Read-only media.
10. Click OK
11. Browse to the drive that was added to your pc (Should be in This PC section of File Explorer, or just on the sidebar)
12. Browse to title\00030017\484e4155\content
13. Delete title.tmd
14. Put in the title.tmd file from the tut folder
15. Go back to OSFMount and click Dismount all & exit. Make sure you do NOT use the Windows eject function, it will break OSFMount
16. Go back to the tut folder and open the twltool command file again. Follow the instructions (and knowledge from an earlier step) to encrypt your nand)
17. Make sure that your old nand backup (nand_dsi.bin) is moved to a safe place (just in case)
18. Rename encrypted_nand.bin to nand_dsi.bin and restore it with fwtool
19. Hope it works
Such is life.
If I get another one, could you help me to make a usable NAND backup?