trailer = ent_create("trailer\\trailer.mdl",spawnp,NULL);
phent_settype (trailer, PH_RIGID, PH_BOX); // set the physics entity type
phent_setmass (trailer, 15000, PH_BOX); // and its mass
phent_setgroup(trailer,4);
phent_setfriction (trailer, 80); // set the friction
phent_setdamping (trailer, 40, 40); // set the damping
phent_setelasticity (trailer, 0, 20); // set the elasticity
trailer.eflags |= FAT | NARROW;
c_setminmax(trailer);
set(trailer,POLYGON);