Mark - It's a fact that you cannot reset the shutter count. But as you know, the default file numbering system starts with DSC and then appends 4 digits, up to 9999, when I rolls over again and starts numbering your files DSC0001. Since I keep my original files forever, I don't want to start seeing files with identical numbers. I also employ two D700 bodies and want to know which body was used for a specific photo. So I learned early on that you can change the first three characters of the file ID, and I use letters to tell which camera body is in use and two digits to tell which cycle of 9999 files I am on. So for may "A" (older body) my files are now identified as A04xxxx. That means the image was shot with my older body and I have sent some 40+ thousand images through it. When it gets out the A049999 -- or very nearly so -- I will go into the menu and reset it to A05xxxx -- and so on. By the time I am up to A26xxxx I will have a quarter million snaps, have changed cameras or be dead -- whichever comes first! You know about Opanda -- for checking the total shutter clicks, I assume.