Saving Assemblies

I was hoping there was a way to take a complicated assemblyfile and save it away as a dumb part model. Does anyone know ifthis is possible and if so, how do I do it? I tried saving it as a.SLDPRT and it turned out to be twice as big as the original file.What I'm looking for is a small file size that would be aplace-holder to represent the physical size of the this assembly inan even bigger assembly that I need to put together. Thanks inadvance for any help or insight.SolidworksAssemblies