Aaron, full commendations on the "Ron's Renamer" program. Unbelievable it really provides full versatility processing changes on all files one swift sweep, without delays or falling on its head, all of which all my camera software Panasonic, Fuji and now Canon utterly failed to provide. Also MS Windows/Office totally failed to acknowedge as a forefront to software users needs, who don't even supply a "replace all" button on file names.
After years of frustration, I googled then found a couple of other Batch File Rename programs which rated well in cnet. One did not load, the other seemed to think us users were conversant with DOS type strings, totally lacking the super user friendly front on this Aaron Stewart program. The Custom function on Date is excellent, with a bit of playing it is easy to get file names exactly as you want, try yyMMdd first to sort files in date order, then ddMMMyy in a string "yyMMdd ddMMMyy": to give a legible date. Likewise the ability to change spacing through the padding cell. What Microsoft could not do with a multi million budget, Aaron Stewart puts on the market free of charge. When it comes time for paying for software usage, Aaron Stewart will be one of my first ports of call.