I'm also having a lot of problems trying to get KY to even install.
I've been playing and modding BG2 for ... like... ever since it came out, basically, and I've never had problems getting other mods to work or at least understanding why they didn't and then being able to fix them. This one though is just so opaque. There is no information about anything, nothing works at all, no one know why or what to do about it, no one can even agree what's wrong. Why is this the only mod for this game that just flat out refuses to do what it claims it does?
I can get WeiDu to attempt at least to install it, and it throws out a billion warnings before finally hitting this part and barfing all over itself:
ERROR: cannot resolve trigger 0x40de
ERROR: [AR0406.BCS] -> [override/AR0406.BCS] Patching Failed (COPY) (Not_found)
Stopping installation because of error.
Stopping installation because of error.
Stopping installation because of error.
ERROR Installing [Keeping Yoshimo after Spellhold], rolling back to previous state
Unable to Unlink [7C-Yoshi/Backup/5/OTHER.5]: Unix.Unix_error(1, "unlink", "7C-Yoshi/Backup/5/OTHER.5")
Clearly this mod simply does not work.
I know it's "beta" and whatever, but other people have claimed to have it working and running, but they have given absolutely no useful information about how.