You do realize that you exert a gravitational pull on the Earth, as do all things, because gravity doesn’t work one-way. The earth’s gravity keeps the moon in orbit and the moon’s gravity pulls on earth’s oceans creating the tides.
I like to think that the ZPEFM creates an area of no-state energy. By negating all of the energy affecting an object, then allowing energy to affect it in one direction would mean that ALL forces, such as gravity, would affect it from that direction only.
What that means is use the ZPEFM on the radiator creating a ZPE field around it, then open a hole in the ZPE Field in your direction and the radiator would launch in that direction because forces such as gravity would be directed through the hole. Same principle in reverse, open a hole on the opposite side and the object will be affected by forces in that direction.
Side Note: All this is one big W.A.G. but it makes sense to me.