Making your mac bend to your will is as easy as bossing someone around. Here's a simple script to let iTunes know you're the boss:
tell application "iTunes" to play track "I Will"
Even when iTunes is asleep it will wake up, frantically search your library for the track and play it.
NOTE: Most, if not all, macs have a built-in applescript editor. Check /Applications/Utilities/Applescript Editor and see if you have one.