Hmm. FindRefs didn't see them and when I dragged them into ErfEdit, there was no prompt to replace existing files.
I have to admit ignorance on this point: if a reference to the script was added in the .utc but script was not in the module or the Override folder, would the loot script actually work?
EDIT: g_assassindrd006 in 103PER as well as 006 and 007 in 105PER do reference it, but KT spits an error about the script existing neither in the module nor as a general game resource. I am running 1.8.2 via the installer.
No idea what the hell is going on. KT does see them listed in Scripts, Compiled and when I reopened 103PER to physically check again, it's there now.