Hi,
I don't see any actions to deal with bundles. but It would not be difficult to build custom actions for this. I simply can not currently to commit into this unfortunately during my free time. but if no one step in with some custom actions, please do get back to me mid july, I will then have more time.
As far as referencing fsm in the loaded assets once loaded and instantiated in the scene, this should not be a problem, and would follow the same rules as if you'd instantiated a prefab:
When the fsm is loading, The fsm fires and global event like "HELLO EVERYONE" to any current Fsm in the scene to pick up. Using the "Get Event Info" you can get a reference of the gameObject and fsm Name.
Bye,
Jean