Use this:
https://www.dropbox.com/s/3lu6wwq77wum32d/GiantPuneTools.zip
Windows application.
Usage is included in the html and txt files.
( Cannot express how much value Giantpune works has had for me, awesome, awesome job! )
For your sd card formatting use this:
http://panasonic.jp/support/global/cs/sd/download/
Any questions, PM me.
If this does not work your Wii probably cannot be fixed via software methods.
If you have Bootmii in boot2 and no other hardware isseus, it should work 100%.
Afterwards, remod your Wii using modmii by XFlak ( Windows application )
http://modmii.zzl.org/ this is the ultimate and mandatory way of softmodding your Wii.
It's safe (no online wii connection needed), easy ( if you can follow instructions ) and the most up to date.
XFlak did an awesome job on this
After you installed it, use modmii clssic and tell it you have never modded your Wii before ( selection 1 )
Beforehand you can set it to use the latest ( and best ) Beta d2xcios from the cios tabs ( 4 ) and enter BETA to set the beta settings.
Follow it's ( your personal ) instructions and follow them word by word.
Afterwards you should have a lean, clean, perfectly softmodded, Wii machine.