*gets out kopitzki's manual*
Wow, this thing is awful dusty.
*flips through to the physics section*
There we go, this is what we need.
phent_enable (ENTITY* entity, var enable);
This function temporarily enables/ disables an entity for physics. If more than one entity is to be changed, it's more efficient to use ph_selectgroup instead.
Parameters:
entity the entity to be affected
enable a value of 1 enables the entity, 0 disables the entity

Returns:
1 if successful, 0 otherwise.
Speed:
Medium
Edition:
C P
Example:
// disable physics entity so we can manually alter its position
phent_enable( me, 0 );
vec_set(my.x, newPosition );
vec_set(my.pan, newOrientation );
// re-enable entity, this will inform the physics system that position/orientation has changed.
phent_enable( me, 1 );
///
so to disable the entity we put in
phent_enable( me, 0 );//we have disabled the physic entity