I think I may have stated here that I'm not a stealth purist; if an application lives up to its promises and does not provoke unnecessary file system turmoil, then I'm glad to put it to use...
So sorry, I didn't test OverDisk portability apart from having its executable in my thumbdrive and verifying that it run well on different systems without installation. When I said I was surprised that it hadn't been checked into TPFC database, I really meant the whole site, especially here at the forum, where I usually find entries that have been submitted (and discarded) in the past. That's one reason why I make my submissions here; I'm no testing whizkid, but I know they'll be at least looked on by other members...
That said, it seems Overdisk stores it's (few) settings in the Windows registry -- it's still rather useful at it's default settings. Feel free to move this to non-portable freeware...