Okay, so this is where I'm at so far:
I have a custom event script for the creature to mimic movement. Inside, I have an event type for handling commands of different types.
I tried editing the rules_core and for the event type EVENT_TYPE_COMMAND_PENDING, i signal an event to the creature with the command.
My problem is that EVENT_TYPE_COMMAND_PENDING seems not to be triggered. I am testing with my Hero. Don't know if it has something to do with it...