Best way to transfer all data to replacement Wii?
Background first: So my launch day Wii finally bit the dust :sorrow: But it had a good run of almost 7 years hard use, so I'm not too broken up about it. It had been fully modded according to the Softmod guide here about a year ago. Being so old, it was able to have BootMii installed as boot2, and even though the System Menu would no longer run, I was able to coax it to run stably long enough to make and verify a final NAND backup from BootMii. I was able to acquire a replacement which was purchased about 6 months after launch and has had very light use since then, so I'm hoping for plenty more use out of it. The replacement has also been fully softmodded according to the same guide, and has BootMii installed as boot2.
So my question is, what's the best/easiest way to transfer all my save files, miis, and if possible, purchased VC games from the nand backup of my old, dead Wii to the replacement?
There is no data I care about on the replacement Wii, so any solutions which would require wiping out existing content are just fine. Is there maybe some way, given the keys.bin files for both the dead and replacement Wiis of simply decrypting the nand backup from the old one, then rencrypting it for the new one and then restoring it onto the replacement Wii via BootMii? I have a full nand backup of the replacement Wii that I made after cleaning off all the previous owner's content and completing the SoftMod, so things that risk bricking the Wii are not a problem if they can be corrected by running BootMii from boot2 and restoring the backup.