I have made a portable version of Eraser, which is a file shredder, Eraser is opensource, enjoy!
Working Link:
http://cubegames.net/downloads/Eraser%20Portable.paf.exe
This launcher works a whole lot better than the 1st crappy launcher
Update: Since July 16, 2007 at 1:57 AM this project is officially forsaken in favor of John's.