Playmaker has some generic ways to work with scripts.
If you know the name of the method you want to call you can use Send Message or Invoke Method actions.
If there are public fields or properties in components that you want to get or set you can use Get Property and Set Property actions.
First thing I would do is figure out what's exposed in the framework and try playing with that... you might need some custom actions, but it's hard to say until you poke around a bit.