I'm just recommending that "Open as administrator" be added into Caja's right-click context menu for files and folders if it hasn't been considered yet. It's been available to nautilus via the 'nautilus-gksu' package for quite awhile now. Hoping this is due to come in soon.
this may need a little work:
from http://www.nongnu.org/gksu/ :
gksu is being replaced by gksu PolicyKit, please take a look at http://live.gnome.org/gksu
stefano-k say: (ps. you can close this #76, now we have caja-gksu)