Well done Texturepack, very clean.
I allowed myself to extend the Texturepack for myself for certain mods namely the Biome mods by runs : Cool Trees ,swaz , redw, rainf aswell a majority of VanessaEs Plantlife
However i did not limit myself to your colorpalette since the diversity of new content would also need a greater diversity of colors.
Needless to say i am not as good an artist as you . Nevertheless if you do not mind, i would share the extension.