Image File Renaming

We have 5,473 images that need their name slightly renamed for SEO purposes. The total size of all the images is 236MB and they will be shared via Dropbox From the attached file, you can see the first image is called A_2600_3DTicTacToe but I want it renamed to A-2600-3D-Tic-Tac-Toe So all underscores ( _ )must be replaced with a hyphen ( - ) Also the names must be split up - most of the time it will be that a hyphen needs to be put between the uppercase and lowercase letters. If you are unsure of how to rename a particular image, simply open the image and you will be able to see what the item is. The words that need to be split up will be separated by spaces, and for the image name, the spaces need to be replaced with hyphens. Other words that need something a bit different: If the image name starts with: A2600 should be Atari-2600 AJaguar should be Atari-Jaguar ALynx should be Atari-Lynx At2600 should be Atari-2600 Dcast should be Sega-Dreamcast GWatch should be Game-&-Watch MCD should be Sega-Mega-CD N64 should be Nintendo-64 NDS should be Nintendo-DS NGBoy should be Nintendo-Gameboy NGBoyA should be Nintendo-Gameboy-Advance NGBoyC should be Nintendo-Gameboy-Color NGCube should be Nintendo-Gamecube NWii should be Nintendo-Wii PS1 should be Playstation-1 PS2 should be Playstation-2 PS3 should be Playstation-3 PSP should be Playstation-Portable Saturn should be Sega-Saturn SGGear should be Sega-Game-Gear SMD should be Sega-Megadrive SMS should be Sega-Master-System Snes should be Super-Nintendo Xbox360 should be Xbox-360 I will be readily available to answer question if anything is not clear during the process. I owuld rather be asked question and get it right the first time than require things to be fixed up after a first attempt.