I think it is new to 6.31.x I think. The new instructions are in the update63.txt. and yes the driver part is very important because you can'y edit the paths in WED without changing it. In my experiance the new stuff didn't work at all until I did so for the newbs that aren't going to read the update file I added that to keep from getting ask the question a couple hundred times. I am working on some mode advanced use of the pathfind in terms of a usable AI. That is going to be Part II. I am thinking of some more thoughtful maze alogorthims in PartIII. I trying to bring it up gradually not to loose the newbie that may want to try this too.