I take back my earlier post (challenge to append leading zero's).
I found a little button on the multi rename window that you use to specify the number of digits in a numeric file renaming sequence.
Another + for using TotalComm. (Still the best file manager for MY requirements.)
 :D
PS. Foldersizer is the other little windows exploder add on that I mentioned back a few pages. (Shows the total byte count of the folders including sub folders as an additional column in "Details" view.)

Gee, I certainly brought WinCommander in to the Spotlight.
I feel glad to have added positively to this topic.
Now you see just how useful that app is.

No thanks, I comply with the T&C for personal use and the prompt is only a 1 button press so it's not all that annoying.
(Unlike some other so called shareware I've seen.)
A friend did pay some money as he uses it in his business.
I'm sure that after surviving some 10+ years and over 25mil downloads that the developer must have gotten something out of it.  :-\