Here you go. The way it works is that there is a tip trigger and a win trigger. The tip trigger tells you to "press <a key> to <something>" until you enter the corresponding win trigger, at which point the fact that you "won" that task is recorded on your player object and you will no longer be pestered by the tip or win triggers that correspond to that goalName. You'll want to take a look at the tutorial mission in the editor because it uses tagged fields on the triggers and it isn't exactly clear. Also, keep in mind that all of the keybinding tip stuff does not work in multiplayer because it uses client-side functions. It's all pretty much a hack.
If you do use this code please rename the datablocks so that you don't break the tutorial mission.