hi, thanks for the reply :) I found out the normalisation feature in moviefactory only works if I add video, and not any photo galleries I create, so I would not need to use it. when I do add video clips, I believe most to be loud enough as it is (even if some clips are slightly lower than others, the "normalisation" effect would not help in lowering any video that I believed to be of a high enough level already!).
normalisation in moviefactory is not available for any photo galleries I would create with added audio/music, but even if it was, I would doubt if it would let me lower any volume levels, which is what I was wanting to do-it would probably, as you say, only try to increase the volume of all my videos to a similar level. audacity was my best best, as I could lower volume levels by setting normalisation levels to less than 0.
I didnt realise that batch processing was available for audacity, thanks for the link