Grab the bottom of your geo, group it, or blast it then you can ray it onto the collision geometry (the sphere in this case), then use Point Deform which will wrap it into position.
is because the find shortest path is killing the attributes needed by the attrib interpolate so just use the attrib transfer them after the find shortest path node.
Not sure exactly what you mean, you have a screenshot here showing some track footage and an image plane. You can move the image plane in space with the depth setting in Maya. Is that what you want? moving the image plane in Z?