How to get a plugins root directory? Follow

Hi Guys,

Another query about my Spell Checker progress / API usage.. I need to
be able to offer users the option to select a dictionary file and be able
to let them add new dict files for use later.. It seems I'll have to move
from a single Jar plugin to an expand zip into plugins folder kind.
Following that train of thought I was intending on putting the dict files
into the root of the spell checker plugins folder - then I noticed IDEA has
it's own Virtual File System..

So my query is how do I get the directory of my plugin?

Is this the best method for providing user/modifiable external resources?

Any hints on retrieving the list of files therein and returning an
inputstream/file object from the selected file / VFS would also help speed
things along nicely..

Thanks

Richard