Preheat oven to 325 F. In a blender, grind the flax seeds well (be patient). Add the water and blend for ~2 min. In a bowl combine the flax mixture, sugar, oil and vanilla. Then add the flour, chocolate chips and walnuts.
Pour into the crusts. The pies should bake for 65-75 min (perhaps longer, I can't quite remember). The recipe was originally for a 10 in. pan, so the pies are somewhat shallow.
Serve warm with vanilla Soy Dream "ice cream"!