Comment utiliser un LJ script

Bonjour,
J'aimerais savoir comment utiliser un LJ script

J'en ai trouver un, je l'ai testé, j'ai appuyer sur le bind pour déclencher le mouvement mais il ne me fais me baisser qu'une fois que je suis retombé par terre, c'est donc trop tard et celà ne me compte pas un LJ.

J'aimerais savoir comment l'utiliser. Merci d'avance.

PS: Voilà le script:
//LongJump Script
// Waits
fps_max "101"
cl_yawspeed "210"
alias wait5 "wait; wait; wait; wait; wait"
alias wait10 "wait5; wait5"
alias wait20 "wait10; wait10"
alias wait40 "wait20; wait20"

// Multi-Strafe
alias strafe.qA2_4 "+left; +moveleft; wait10; -moveleft; -left; strafe.qA2_right; strafe.qA2_left; +right; +moveright; wait10; -moveright; -right; +duck; wait40; -duck"
alias strafe.qA2_left "+left; +moveleft; wait20; -moveleft; -left"
alias strafe.qA2_right "+right; +moveright; wait20; -moveright; -right"
alias _jump.qA2 "+jump; wait; -jump"

// Pre-Strafe
alias s.qA2_run "+forward; wait40; wait10; wait10; -forward"
alias s.qA2_pre "+forward; wait40; cl_yawspeed 105; +left; +moveleft; wait40; wait20; -moveleft; -forward; -left; cl_yawspeed 210"
alias run_qA2.LJ4 "s.qA2_run; _jump.qA2; strafe.qA2_4"
alias pre_qA2.LJ4 "s.qA2_pre; _jump.qA2; strafe.qA2_4"

// Edit Here
bind "ALT" "run_qA2.LJ4" // Straight-Forward Runup
bind "CAPSLOCK" "pre_qA2.LJ4" // Pre-Strafe Runup (Further)