Jon,Try edit pad (freeware). I haven't tried it on a 2 GB file, but it did open a 250 MB file (T'bird inbox, not renamed). Be patient; Editpad needed some minutes to open and close the file. Emails incl. headers were readable in ASCII; attachments (jpegs, etc.) of course not.Hope this helps. FlashAttachment: editpad.zip
Description: Zip compressed data