what you need is to use AnyRegionChanger1.1b_mod5, this one installs a SysMenu prepatched with certain hacks that enables the real region free, and that is what you're missing from packages like MiiWii and softmii, after this only reinstall cIOS30 from CIOScorp package, cause ARC installs a IOS30 so the cIOS capability will be lost, so:
1) Run that specific version of ARC (ARC1.1b_mod5)
2)Re-install cIOS30.wad from CIOScorp package
3) Enjoy your games
PS. still some games don't like to be forced to other video output, so you still need the launchers for certain games, Eg. PIKMIN1 can only work if you have japanese language setted, Deal or no Deal (PAL) don't even have NTSC video mode, and so on and on, but this are only a few cases...!!
EDIT: disable all the hacks in preloader that has to be with region free or GC stuff, that breaks region free in some games