"Merge" Files?

 From:  Satoribomb
Hi Michael and MoI Community,

I'm working on a fairly complex model using my TabletPC (my desktop is down for the count). I'd like to know if there is a way to merge .3dm files - add geometry from one file into an already open model. This way I would work on sub-components and combine them into my finished model while still managing the limited resources of my Tablet.

Is this even possible now or will it become possible soon?