Using sub assembly motion studies

I was just wondering if there is a way to re-use the motion study of a sub assembly in the main assembly? Kind of in the same way that you can use exploded views of sub assemblies. If not, how do you allow the movement of parts which are not at top level... without recreating a whole new assembly with all parts on one level.

I hope this makes sense, i'm relatively new to motion studies... having some good results using motion studies for walkthroughs (using path mates), but i want components to move without having to 'flatten' my assembly.

Thanks in advance,

Tom

SolidworksMotion Studies