EDIT: Ahhh jaydrake beat me. But my example has a kazoo in it, so I'll leave it :) Easy :) In the render window, hit the "Wildcards" button next to the filename dialog, and select $track. Then put any prefixes or suffixes you like in the filename dialog. Done. So for example, say you have 4 tracks named "drums", "bass", "guitar" and "kazoo". You set your filename dialog up to say "track $tracknumber $track of my lovely song". And you'll get the following filenames when you export stems: "track 01 drums of my lovely song.wav" "track 02 bass of my lovely song.wav" "track 03 guitar of my lovely song.wav" "track 04 kazoo of my lovely song.wav" Lots of other handy wildcards in there too. Time/date stuff, computer or user name, project name, even tempo & time signature. Lots of flexibility. Hope that helps :)