I too am wondering how to create a nutcracker model for my eaves.
until single strand effects gets finished, just use a single line. if you have 4 strings of lights 50 each, enter them as 4 strings of 50.
now chases will go across your entire roofline (chases are spirals for now)
you wont be able to make each segment of your roofline a different color, the whole roofline will be the model. twinkle, colorwash spiral, strobe (twinkle option) all will work great.
thanks