Final Fantasy IV: Complete Collection

[Zero_Hawk]

I don't understand how to substitute the index code for the item I want, I'm new to this whole thing. Basically, I don't want to break the game and get every item I just want a very specific code for the Mythril Nuts and Mythril Bolts so I don't have to grind for them. If someone could help me out I'd be greatly appreciative.

Edit - I brute forced it to get the codes I wanted. Here they are for anyone else looking for this specific code set.
_C0 98 Kokkol Ore
_L 0x0079452C 0x00000062
_C0 98 Doll Parts
_L 0x00794538 0x00000062
_L 0x0079453A 0x00000062