hi frank r,
I am having the same problem as you are about
changing the Right Mouse button function!
So, "I wrote Doug"

this is what he told me;
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" Eagle,
The jumping force is set with the other forces in the "_player_intentions()" function. The lines in question are as follows:
// Set the cartesian forces according to the player intentions
force.X = strength.X*(KEY_FORCE.Y+JOY_FORCE.Y);
force.Y = strength.Y*(KEY_COMMA-KEY_PERIOD);
force.Z = strength.Z*(KEY_HOME-KEY_END);
Force.Z is the "jumping/ducking" force. This force is passed through a lot of functions until it finally arrives at "move_gravity" (if the player is on solid ground and not already jumping or ducking). The following lines handle the jump:
// if we have a jumping force...
if(force.Z > 0)
{
// predict the initial speed required to reach the jump height
// v = a*t; s = a/2*t*t; -> v = sqrt(2*a*s)
MY._SPEED_Z = sqrt((jump_height-my_height)*2*gravity);
// scale distance from jump (absdist.z) by movement_scale
absdist.z = MY._SPEED_Z * TIME * movement_scale;
// ...switch to jumping mode
MY._MOVEMODE = _MODE_JUMPING;
MY._ANIMDIST = 0;
}
Doug"
=============================================
your friend,