I am going to download RenderMonkey and check out the format that they use. Maybe something like a code converter would do the trick... or make my tool have the ability to import RenderMonkey shaders. I'll check it out and get back to you all.

@bupaje, I was actually thinking of doing a wizard to accompany it that would driectly insert your created shaders into your wdl file, and then come up with a list that lets you choose which actions have which shaders. Just an idea..