is it possible to merge the .epp?

I have a done a few different searches with similar keywords, is it possible to merge 2-3 .epp (project files) into one so that no emails occur more than once before I convert it into a CSV? (it seems to be that computerized id of multiple occurences are only avaliable within the spider, if someone knows any program that can scan excel or gnumeric, then i would be interested.  if anyone know any other ways to edit and organize projects smoothly some input would be very much appreciated.

ps: is it possible to run a csv or excel spreadsheet back to the project space where the occurences are brought down to 1 in nr?

thanks for your attention