It's a cool utility indeed. Now that I've tried it for myself, I've got a few questions here, if I may:
So, I decided to check creatures in my mods by installing crefixer version 2 after Coran NPC and Xan NPC.
1) Coran's .cre files weren't modified by crefixer - does it mean that they're okay?
2) Xan's O#Xan09 and O#Xan25.cre were modified by crefixer, although I used the .cre files you gave me in January. Does it mean something is still wrong with the files? Or that crefixer didn't like me patching O#Xan09.cre's soundset in tp2?
3) I noticed that some of my other files (O#Khalid.cre, O#Merc.cre and so on) got patched by crefixer, too. If I want them to be okay, should I take the patched files from the override and copy them to my Xan/Characters folder, to include them into the distribution?