Thanks to the good work by the guys at Portableapps.com, there is now a portable version of Eraser 5.82 available
http://portableapps.com/apps/utilities/eraser_portable
http://portableapps.com/apps/utilities/eraser_portable
I'm wondering why they just don't use the portable version "period"?
It is a repackaged version of the popular Eraser utility designed with portability in mind, so it has all the same great features of Eraser, but there's nothing to install.