Be careful though. You will be processing a volume increase to the actual audio data. Many (most) soundpack sounds are already pretty much at maximum and raising the level further will just cause distortion (unpleasant distortion at that). You may want to use a Limiter (within the sound editing software) setting the threshold to maximum (0 db) or just below (-.2 db or so) with a gain increase BEFORE the limiter not as makeup gain after the limiter.
I would be happy to explain further once you have the editing software and let me know which it is.
zes