Added some comments

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@168 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Small issue w/ Performance Demo

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@169 edb9625f-4e0d-4859-8d74-9fd3b1da38cb