It's a nice notion, and something that might be possible in the future with scripting, but don't get your hopes up
![Cheesy :D](Smileys/default/cheesy.gif)
Originally the asteroids were going to be completely mobile, so there's still remnants of that in there. There are a few things that have gone in since (root systems) that are a bit static though so those may need a bit of a reworking for something like this to work. After release maybe.