For now, the only method is copy/pasting. I know that is not always handy, but it was the easiest to do and I needed the program now. I see the added value in having it reading ePUB and/or XHTML, but that will be some work. The main problem would be in identifying only the required characters in a class.
I will take a look at ePUBtweak to see if I can use the output from it. It might be a good idea.