[MaxMax161]

I haven't looked at your code but I'm assuming it works. Making a multiplot grpah in labview is pretty easy. All you need to do is bundle two or more single pot graphs. Just take the single plot XY graph (I'm not sure if it's an array or bundle of the top of my head) that you were feeding directly in to the plot XY graph indicator, duplicate it changing values, ect, so it graphs what you want, and then bundle the two together. All you have to do then is feed this bundle in to the plot XY graph indicator.

As far as color changes and such go if on the front panel you right click on the XY graph and select preferences there are a bunch of options you can mess with there.