if there's a version of nintendont "just" for ustealth drives, then it's a very old version of nintendont. one that was modified when the official build didn't have the compatibility yet.
there's no way nintendont 5.x need a specific ustealth version.
the most recent is enough. Ustealth is working since 3.x
I don't remember if the open source HBC has been updated to be compatible with Ustealth drives.
Latest release can be found here : https://github.com/FIX94/hbc
I didn't read any mention about being compatible with modified partition table signature.
Thanks Cyan...I'll leave you be as you've helped me much more than most would have. Just as a side note, do you mess with PS2s as well, or do you stick with Wii/WiiU only? I'm getting ready to start softmodding my PS2 when finished with the WiiU which should be fun.
Talk with you later...MOST humbly & sincerely...Tom