Well, I finally broke down and started using TGTP to fit my own style, rather than the other way around.
This render is 100% TGTP, but does include some image maps I created in photoshop and applied using the image map shader. The thing I like is, TGTP lights/shades the maps perfectly and in its own way to fit the scene! Its probably not the true way TGTP was meant to be used, but I love the results.
If done correctly, you can create foliage maps, rock maps, etc, and TGTP will apply them seamlessly.
Still some work to do (there always is), but I like this technique, as its fun, quick, and flexible. This image only took about 20 mins to render @ 800x600.
I hope you like it. I did some minor color/contrast/sharpening corrections in Photoshop, but even the native render was presentable.