How I figured it out, I used DML_booter_SVN_r30_HBC_Pack put files from it to app folder on SD, and put ISO in SD card under games folder GCCE01 ID folder of my game Final Fantasy Crystal Chronicles used DiscEX to extract files off Games ISO , But when loaded game vr DIOSMIOS bt Home brew channel the wii just reset its self...
(NOTE) DiscEX creates the ID folder somewhere on your harddrive locate it, just drag and drop ISO image onto exe to start crate ISO, once one just put the folder into the games folder on your sd card
So got this other file called DIOSMIOSLite_2.10.wad : Placed it on USB Loader GX 4.3 Updated Version WAD folder, and installed it from the WAD manger v1.7 IE: select, ios249 / disable / wii slot / wad / install DIOSMIOSLite_2.10.wad
Reset back to HBC
Loaded HBC again run DISMIOS , selected my game from SD and Bingo game loaded.
I'm using Verbatim 16GB SDHC class (4), and still worked, So yes you can use some SDHC cards.
Hope any of this helps.
Added file if needed.