TingedAce released a new version of XNand Healer GUI - a GUI app to help you dump and manage NAND files, remap bad blocks and also uncripple your Xbox 360.
What's new/fixed:
* Support for 14717 / 14719 building
* Support for Multibuilder 0.8x (14717/14719 and dashlaunch 2.32)
* Support for CB 9230 for slims (no need for CPU key in advance)
* Added alpha feature to program Coolrunner with Nand-X
* Added Copy To USB feature (also copies xenon.elf v4 for you)