[KevinH]

Hmm ... since all of the real work is done in rename_files for Calibre, that is very true. I think I could do something similar by extending the Sigil launcher interface and have it call the rename file code inside Sigil in a similar manner.

But I still think the easiest Sigil-based solution is to simply take care of that when the epub is first loaded. So if you are in need of a plugin quickly, doing what Kovid recommended in Calibre is probably the way to go until/if we release this feature in future version on Sigil assuming there is demand for it.

Thanks Kovid!
KevinH