SED has a huge learning curve partly because the documentation is so astoundingly unhelpful and confusing. SourgeForge clearly didn't write it with non-techies in mind. So far, I can't even get SED to run, and I'm not even sure I've got it installed correctly.
Do you have to install GnuWin first or something? Is there a help page somewhere that explains all this in "plain English"?
Sorry, just frustrated… been at this for an hour now…