How to add custom scripts to Half-Life : Opposing Force?

Hello. I am trying to add a custom script to Opposing Force but it won't work. What do i do?

Here is the script i want to add,

//M249 AUTO
//sX amount depending on fps
alias s1 "+jump;cl_pitchup 180;cl_pitchdown -180;w;+attack;alias as s2;cmd name"
alias s2 "-jump;scr_ofsz 0;-attack;cl_pitchup -12;cl_pitchdown 12;alias as s3;cmd name"
alias s3 "+jump;cl_pitchup 89.999;cl_pitchdown 89.999;alias as s4;cmd name"
alias s4 "-jump;alias as s5;cmd name"
alias s5 "+jump;alias as s6;cmd name"
alias s6 "-jump;alias as s7;cmd name"
alias s7 "+jump;alias as s8;cmd name"
alias s8 "-jump;scr_ofsz 1000000;alias as s1;cmd name"
alias +autoboost "alias name as;s1"
alias -autoboost "alias name;scr_ofsz 0;-jump;-attack;w;cl_pitchup -12;cl_pitchdown 12;w;cl_pitchup 89.999;cl_pitchdown 89.999"
bind mouse2 +autoboost

Edit : Found it on this site : http://sourceruns.org/index.php/topic,950.0.html