Mitchell & Baz, stacking can be of benefit. I personally don't really like it, I consider it cheating, but each to their own. I've used CombineZM in the past, very good (and free) software. A stacking tutorial I wrote:
www.macro-images.com/CombineZM_tutorial.doc
And an example stacked image (5 slices):
http://www.macro-images.com/images/M...998%20copy.jpg
Dave
edit: the tutorial is 2 years old now, I haven't updated it, probably won't. Some parts may no longer be accurate.