What 2 things are you speaking of?
Sorry, not sure what you mean...
If you want to have 2 fluids systems working together (i.e. 2 fluids mixing together) currently, that is not possible with this release of fluids
Maya 5 corrects this I've heard....
If that's not what you were asking, then can you elaborate a bit? Thanks!
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
izzylong.com