I have dl'd the trial version of CCleaner, version 5.02.5501. I am running WinXP SP3 on a Dell D-630 laptop which uses a Western Digital Scorpio Black WD3200BJKT-00F4T0 320GB 7200 RPM for its boot drive (c:\).
I have run the CCleaner wipe free space function four separate times in ascending order of throroughness (simple, advanced, complex and very complex) on this HDD. After doing this, I ran eSupport's Undelete Plus program which goes into your HDD and recovers deleted files, even if they have been removed from XP's Trashcan. Undelete Plus recovered 80,000 graphics files (jpg, gif, tiff)