VSPro non-0 terrain height

Hi again, In MM1 I usually set my water level at Y=0, so I usually position my MapMagic Object at Y=-50, for example. I work with big maps, so I also set the overall map height at 3000. The problem is, it was quite complicated to get Vegetation Studio going, I managed to do it, but the VSPro object generator does not account for the position of the mapmagic object, hence, my trees are floating. If I move the Mapmagic object to Y=0, it looks ok, but if I place the MM Object at Y=5, my trees are half below ground... I tried with and without the Floor generator, and it doesn't work. This doesn't happen with the normal MM2 object placer. Stuff is placed in the surface no matter the Y level of the MM object. I could set the MM object to Y=0, but that would ruin other things I have that count with a water level at zero... Is there a way to approach/fix this?