Hi Simon,
It depends really on how 'interactive' you need the simulation to be. Some options are:
- Show a video using the media component
- Highlight points in a still-image using a hot graphic
- Show different states using a narrative
You can see examples of each of these in the Adapt v2.0 demo.
Aside from these, you'll need to write a custom plugin. Captivate content has been embedded in Adapt in the past, but not without problems.
You might want to head over to the Responsive eLearning Forum, where the instructional designers hang out, as they might be able to offer more useful advice on presenting such content in Adapt.