If it's for a private server... you just can't add it, the swf doesn't have the assemblies for the abilities (you can always add them by your own), so: search for a newer swf or use newest swf (I don't recommend you do this).
If it's for a GM based remix:
Add the sprites as a normal ship and add to the gamer object an event for when a key is pressed to execute the abilitie:
Code:
Object: gamer
Event: Key pressed [H]
if(shipID == 49)
{
canUseAbilitie = true;
draw_sprite(gamer.x, gamer.y, healthAbilitie_spr);
hp += 40000;
if(hp > maxHp)
{
hp = maxHp;
}
} else {
sendMessage("You don't have an special ship, you can't use this function");
}
See you!!