The BootMii team has released a test of their next installer. This is BootMii 0.4 It has the fix when restoring NAND Dump it will not tell you it is for another system. Also included is HBC 1.0.4 and seems like more SD Card compatability.
Give it a try...
EDIT: Make sure you make a new nand dump after install. This does take longer than previous release.
Will do, been a while since my last NAND backup. Thanks m8.
Not really doing much Wii stuff these days.