Assemblies?

At this point the post-processing is a necessity unless your CAD software can output an amf.xml file directly...

By post-processing, I am referring to the steps required in the export of the .stl files and in Slic3r...

Thus far, Solidworks does not support processing multi-material STL files directly.  But it is fairly straightforward if you construct a 2 part assembly; assuming that each part is a distinct and manifold body.

Once the assembly is to your satisfaction, use the "Save As" .stl; and under "Options" make sure "Save all components of an assembly in a single file" is unchecked.

This will save 2 distinct STL files but retain in each the origins necessary to pair them together properly during slicing. 

Then, follow the instructions in the video posted in thread below at about the 10 minute mark.  Note that Slic3r will need to be run independently (not in RH) for this to work:

http://www.soliforum.com/topic/9155/dual-printing-stls/

So this procedure, while a bit of a pain, is fairly straightforward...I plan on doing a full-blown run through once I get my Chimera / Cyclops