No, you shouldn't need to modify anything else, i believe.
Just make sure you saved the changes via "Ctrl + S" and then you can start the game.
You'll know if the mods are working if you will find 99 books of enlightenment in your inventory(after moving from a map to another).
You can also test if you are taking any damage in battle.
However, if neither of the above tests worked, can you show me how you modified the TY_ModLoader.js?