Betwiin is a tool that will let you convert NAND dumps from one Wii to run on another.

Overview
This here is betwiin, a NAND flash conversion tool for Wii NAND images. It can re-encrypt and re-HMAC the per-console unique parts of a NAND dump from one Wii such that it will run on a second one.

Usage
* Copy input dump file to input/flash.bin.
* Copy input keys to input/.
* Copy output keys to output/.
* Run betwiin.py, wait several minutes.
* Take output file from output/flash.bin and use as appropriate.