Wow, this is a really great collection. Good work! But you can edit the channel installer for WiiSX a bit to use it for the modified and improved version WiiSXR (https://github.com/Mystro256/wiisxr/releases)? That would be great!
It would probably only the folder paths are adjusted, so instead of ../WiiSX/ would have to be ../WiiSXR/. I do not know about WADs like this, otherwise I would do it myself.
I'll put one together for ya in the next few days. I made one for the Dark Umbra version awhile back. Here's that if you want to use it in the meantime.
http://www.mediafire.com/file/p88x9481t3wr1pm/wiiSXR_v14_-_DXRA_%5BDU%5D.rar/file