http://pastebin.com/rPPhAhEj
Don't forget in the main file (maps\mp\gametypes\_killstreaks.gsc)
[php]setDvar( "scr_airdrop_ammo", 0 );
setDvar( "scr_airdrop_uav", 0 );
setDvar( "scr_airdrop_counter_uav", 0 );
setDvar( "scr_airdrop_sentry", 0 );
setDvar( "scr_airdrop_predator_missile", 0 );
setDvar( "scr_airdrop_precision_airstrike", 0 );
setDvar( "scr_airdrop_harrier_airstrike", 0 );
setDvar( "scr_airdrop_helicopter", 0 );
setDvar( "scr_airdrop_helicopter_flares", 0 );
setDvar( "scr_airdrop_stealth_airstrike", 0 );
setDvar( "scr_airdrop_helicopter_minigun", 0 );
setDvar( "scr_airdrop_ac130", 0 );
setDvar( "scr_airdrop_emp", 0 );
setDvar( "scr_airdrop_nuke", 0 );[/php]
As long as the scr_airdrop_ dvars are set to the default you will get the normal streaks in care packages.
Edit: Changed the _airdrop.gsc as i figured out a problem that might happen. fixed now