How do I mirror an SVN repo dir structure in my working dir without a full root checkout?

$/  -->  C:source

$/foo/bar/project1

C:sourcefoobarproject1

http://mysvn/svn/foo/bar/project1

C:sourcefoobarproject1

......barfooproject2

C:sourcebarfooproject2

http://mysvn/svn/foo/bar/project1 foo/bar/project1
http://mysvn/svn/bar/foo/project2 bar/foo/project2