Redline99 offers a small utility that allows you to remap the bad blocks of NAND image "zeropaired (xbreboot).
The program checks your nand backup (you should have done) and research sectors to be used to remap the bad blocks. You can also specify the ID of bad blocks in the dialog.
The program does not modify your original backup, but it changes the image zeropair. Do Q'una application once, and make a backup before anything else. The application not having been tested, if bugs appear, Redline99 try to correct them according to user feedback.
Finally, Bad Block Mover works only with images 16MB, except for the Jaspers who are not supported.