Use casper to load bootmii and make a nand backup. Use capser to load MMM or wiimod via cboot2 and install all the wiimod wads, priiloader, etc. Then you can try to uninstall reinstall ios58 and see if that will help with reinstallng the HBC. Regardless you don't really need the HBC, but it is nice. If you can't get HBC to install priiloader and postloader should do what you need until you get it sorted.