Guide Backup Nand (contains Wiiu System / vWii System)
Thx Adr990
Read this:
http://wiiubrew.org/wiki/TSOP_NAND
Someone via IRC did this recently, and documented it to that page.
The Wii U NAND and vWii NAND are the same chip. Just two different banks in the chip.
You can use something like...