Thank you for your quick reply! [:)]

That is where I looked (I mean the SunFlow wiki) and you can see where I was going wrong, this is what I typed in as a test.

this.sunflow.parameter("bump.texture", imagePath);
this.sunflow.parameter("modifier", "bump_mapping");
this.sunflow.parameter("scale", 1);

I got close! [:)]

db4tech

Edit:
Well okay after looking again, maybe I wasn't so close! [:D]

Thanks again!