Assuming these are the RBHP upgrades…

If you pasted the keys upgrade folders over top of the regular folders, it should have replaced the relevant files with the keys/pro keys versions. If you don’t (if they’re still nested), it won’t, and you’ll likely get a bunch of warnings about duplicate files in the packager.

If you’ve got harmonies working, that means you’ve got the rest of the process figured out, so it has to be problems with the songs.dta and .mid files.

If you’re actually trying to integrate them into the original export pack CON, that’s outside of the scope of my project and someone more proficient will have to advise.