With MESH.GetPosition
Physics.SetBodyPosition PHYSICID, 0, Land.GetHeight(.x, .z) + 15, 10
End With
Use that after you initialize the physic engine.
MESH.SetPosition Physics.GetBodyPosition(PHYSICID).x, Physics.GetBodyPosition(PHYSICID).y, Physics.GetBodyPosition(PHYSICID).z
MESH.SetRotation Physics.GetBodyRotation(PHYSICID).x, Physics.GetBodyRotation(
PHYSICID).y, Physics.GetBodyRotation(PHYSICID).z
Something like that should make the mesh and the physic body right, just use the above code where you update the scene.
http://www.youtube.com/watch?v=dtRR-goiik4&feature=player_profilepage^^ not sure where the code for that is anymore though or I would have something better for ya.