canon560 said:maybe it's delete the official IOS and install the new one, and the uninstaller delete the custom IOS and reinstall the official one...
nope, these are exatcly Waninkoko's WAD Installer 2.1 and Uninstaller 1.1, I compared the .elf files
in the second link, Installer and Uninstaller were renamed and inversed, someone probably thought it would be funny