Migrating an SVN repo subdirectory

[Stuart P.Bentley]

I'm looking to import a project over from SVN. This project (due to no SVN 
planning) is in a folder in a subfolder of the root folder (each containing 
files as well as folders). If I try to do a bzr svn-import, it complains 
about the directory being inside a branch (even if I edit the 
subversion.conf to define the path to the folder as a branch). I cah't 
really migrate the entire repo, as I accidentally committed several very 
large files. How can I import just this one folder?