OK, I mentioned this was in the works earlier in the week and it now works insofar as I have tested next/previous-difference, quit, copy-A-to-B, copy-B-to-A, and restore-diff. It is no where close to being done, it is more like proof of concept. There's almost no error checking. But I figured I'd send it out and see what people think. Let me know. I occasionally have this signalling a window-live-p error on one of the ediff buffer windows. I believe it is because ediff keeps a pointer to the windows and popper tends to split a window when showing some help then upon burying it ends up leaving the new window created by split-window in place of the original. It'll get fixed. Is keeping pointers to windows evil or what? Greg