Hi,
When editing an action sequence, if you select a component on the canvas that has more than 1 state, you can add the "Set Component State" action to it. Unfortunately, this will not let you edit a state of a component outside of the current component.
As a workaround to this, you could create a short 1 second video clip in something like Premier or After Effects, and import it into your Flash Catalyst project. You can then trigger its playback from within the action sequence. (it doesn't need to appear on your canvas, you can just keep it hidden somewhere, and trigger it when the time is right).
You can then assign that clip an "On Playback Complete" interaction which DOES let you target other components in your project.
Hope that helps.