I think creating a workspace is a core eclipse functionality, not sure it it is accessible from outside. But it may be 
worthwhile to ask this question in the eclipse community directly. There are a number of things that can be done from 
external.

The next step is to import the system builder project into that new workspace. Simply copying the folder into the 
workspace directory is not sufficient to make eclipse recognize it. Again, you would need to check with the eclipse 
community if the functionality of the project and import wizards is available from outside.

Then - mksbp should work.

Btw what is the background of your question? Automated builds?

Regards
-Albrecht.