LameDrop is a real handy tool http://www.rarewares.org/mp3-lamedrop.php

it is just a floating icon you drag the green track name or master onto
you will find the mp3 in C:\bb\DragDrop
right click it for options like output folder n bitrate

RealBand > Render > Merge to Stereo wav > drag wav on lame drop.

Use mono encoding for mono tracks.