Importing/linking-to online parts: possible?

Hi all, I was wondering if it is possible to include online parts in assemblies instead of having to manually download and insert them into assemblies.

Example: If i have a part located at http://dropbox.com/username/mypart.sldprt, can I include/open this resource directly into my assembly (or a library), or must I download it every single time?

Thanks!

SolidworksAssemblies