It's called nitrous, chief, and do a little research on it and you probably wouldn't be posting this. Yes you can put it in, yes it's fairly easy to do. Get a Nitrous Express wet system, don't use a nozzle higher than 35HP or 50HP on a stock engine.
start using that search button man.......if your not sure, look around, the best way to get ideas and see how its done is to look around. its alot more effective to look rather then opening a new thread and ask every damn question when its been asked and answered a million times (and trust me, almost EVERY question has come with when it comes to alero mods)