Thx Scorpion, I'll try it right away.
Though this question is a bit off-topic, it's still about physics. I noticed that there exists some kind of a physical bounding box around a physical object with PH_BOX. But the size (scale) of this box does not differ depending on the size of the phys object. And when this object is very small this box does not allow other entities to get close to the phys object. when I make it bigger again, I can move other entities closer. For my game I need to keep the phys object small, but the box is very annoying, is there a way to change its scale? to make it smaller?