Find the player.ini files in your extracted copys ini dir.
Open one of them (a net_xx_xxx one), and change the PL_JUMP to whatever you want. Also Change your hitpoints to 1, 1.
This will cheat the sever so it thinks that 1 is your 100% HP. So you will only be able to take 1 in fall damage.
However after 100 jumps u will die, so its a good thing to change 1 to 0.01 or something like that,
written by mullah omar