Importing .rtf files with annotations

I send my chapters to a friend for editing. She returns them with comments. When I save the file as .rtf to import it to Scrivener the comments are lost – the split-screen mode is so perfect for editing, but no matter how much I’ve tried, I always lose the comments.

I’m working with Scrivener for Windows 1.55 and OO Writer 3.2.1

Any help would be much appreciated.