Hi letsgoheat! I agree with arsheesh... I mistook your forests for cold tundra before reading the names...

You've got different techniques here :
http://www.cartographersguild.com/sh...-style-forests
http://www.cartographersguild.com/sh...matic-Forester
http://www.cartographersguild.com/sh...mp-Trees-Brush
http://www.cartographersguild.com/sh...l=1#post176305
http://www.cartographersguild.com/sh...l=1#post183105

Here is what I found after a quick search here... Feel free to use the searching engine of the forum.