You need to make sure it does not add any formatting -just "plain text." I've used Word for editing CR2's and Mac's Free Simple Text as well.

Quote - ero, Do you mean just a robust text editor?  Notepad++ is good and I use it often but it slows on anything 1MB or higher.  EditPad Pro has quite a bit of the same functionality and can handle very large files - it even has highlight matching now, a bit rudimentary but it's getting there.  EPP search and replace is superior to Notepad++ (sans plugins). It's my workhorse editor when I'm not scripting.