assuming it handles text the same as HTML, have you tried a normal HTML editor, eg CoffeeCup, NoteTabLite, etc, and coding those special characters in yourself?
I am responsible for updating an events calendar at work and most of the pages are coded in PHP. I take text from Word and paste it into the browser and export it to the calendar.
The problem is that all the fancy quotes and double dashes from Word aren't recognized by the browser and displays a question mark (ex: ?Title?). I found this plugin "Naughty Word Chars" that fixes this problem, but don't know if it would work with PHP. I dont' know PHP and I barely know HTML. So if anyone can tell me whether the plugin works with PHP or give me an alternative I would appreciate it.