I am making music for a game. The music needs to be eerie.?

[j a]

I have FL Studio 9 with ReFx Nexus plugin as well as Z3ta+. I am wondering if anyone knows of a music box type sound for either of these plugins/VSTs and if not are there any expansion packs or other free VST plugins that I could download safely to use? The music has to be eerie and mysterious and i thought a music box would be a good idea and the creator agrees. If anyone has any other ideas I would be very happy to hear them.
yeah, i'm thinking along the lines of Davy Jones' theme from Pirates of The Caribbean kinda like the start of this: http://www.youtube.com/watch?v=hLaAdnkP5oM

...heres something for some inspiration though, check out the quake 1 soundtrack.