Here's some useful information on how to substitute
WHOLE WHEAT FLOUR
How to substitute whole wheat in your favorite recipes.
Whole-wheat flour
usually can be substituted for part or all of the all-purpose flour in most recipes. When completely substituting whole-wheat for white, use 7/8 cup whole-wheat for one cup of white flour.
Whole wheat is heavier than white flour and needs more leavening.
In yeast breads, use more yeast and/or let it rise longer
In baking powder leavened products, increase baking powder by 1 tsp for every 3 cups whole wheat flour.
Recipes using baking soda need not be adjusted.
A bread recipe using WW flour may take 1 or 2 cups less flour. This is because whole wheat flour absorbs more moisture than white flour.
In baked products using eggs, separate the eggs and beat whites until stiff. Then fold in just before baking. For extra lightness, an extra separated egg may be added. Good for waffles and especially cakes.
For more great information on WHEAT, go to the link below (the above came from this link):
WHEAT 101
http://ldsweb.org/rs_art/wheat101.html
[This message has been edited by Debelli (edited 12-05-2000).]