Downloading these from the homebrew browser means you're not getting the usb mods, and I'm also gonna assume (unless you're putting them in the wrong directories) you don't have ios202 installed, this is pretty much an essential here, especially for WiiSX...
Download the mods by matguitarist (in the WiiSX case, the latest one to run using ios202, 58 isn't fast enough for this emu) on here, and make sure your usb is formatted in FAT32 (or at least you have a primary partition, also being FAT32)
Sod the channel too, no use..... there's no channel forwarder for the latest release of WiiSX so you'll have to run that from the HBC