From what Ive heard, installing power windows is as easy as installing power door locks. The window motor works somewhat the same as the door lock actuator. Though Ive never installed power windows, I can guide you through your alarm and actuator installation. Wiring up the relay is no biggie either, as long as you know how to follow diagrams.
If you've never installed an alarm before, and you are the type that doesnt have patience for things, then dont bother trying. Gotta have patience, gotta have tools, supplies, and a couple soda's on hand before you start. If you decide to get your alarm installed professionally, make sure its a reputable installer. Remember, the alarm is only as good as the installer

You can get the top notch remote starter alarm system hooked up in your car but a slack off installer could easily do a weak job installing, causing you problems in the future