is there anything else other than the game chip eeprom required?(besides the kit obviously lol)
The answer is, "it depends."
You will for sure have to change the REEL ("SS") EPROM (one E, not two). You may have to change the GAME ("SP") EPROM installed in your Triple Cash game
if it doesn't support Double Diamond Deluxe. If it's one of the more common ones, it likely supports Double Diamond Deluxe without needing a different chip.
Triple Cash is a Type 0 game. Double Diamond Deluxe is a Type 5 game.
Determine your current GAME ("SP") chip number (instructions
here if you need them), and then look at the
SP chip list post to see if your current chip supports Type 5 games. If it does, you do NOT need to replace the GAME ("SP") chip in your machine.
The following FAQ then lists the steps involved to change the game kit in your machine:
NLG S+ Game Change FAQDo NOT clear your machine or reset any settings unnecessarily.
If you encounter errors not listed in that FAQ, use the
NLG Common IGT S+ Errors FAQ to help you out.