For Debian-based, non-Ubuntu distributions this does not work as presented for Pcmanfm 1.2.0. It can be altered to partially work,that is, right clicking on a folder will present the option "open as root". The problem is that regardless of the folder at which you are aiming, clicking "open as root" always opens your home folder (as root). Of course, you can then navigate to the desired folder and open it (as root). This is inferior to what I described above, creating a psmanfm-root, because there the "open with" option will offer pcmanfm-root which will open the desired folder immediately (as root).