I'll test it later today - but something I realized with the codes listed, many of the inventory codes include the P1 offset AC4723D0 making it fairly easy to edit for other players, but some do not like, for example:
[Trees and Bushes]
04100000 AC472418 00000B2D
04100000 AC472420 00000BCE
04100000 AC472428 00000BD3
04100000 AC472430 00000ECC
04100000 AC472438 00000ED0
04100000 AC472440 00000ED4
04100000 AC472448 00000ED8
04100000 AC472450 000030BE
04100000 AC472458 000030C2
04100000 AC472460 000030C9
04100000 AC472468 000030CC
04100000 AC472318 00000AEF
04100000 AC472320 00000AF5
04100000 AC472328 00000AFF
04100000 AC472330 00000D2F
04100000 AC472338 00000D2A
04100000 AC472340 00000D20
04100000 AC472348 00000D25
04100000 AC472350 00000D35
04100000 AC472358 00000AFA
04100000 AC472360 0000114A
How would one change this to work for P2?
Add 6D6C0 to the value of the Slot ID for next Player everytime.
[Trees and Bushes (Player 2)]
04100000 AC4DFAD8 00000B2D
04100000 AC4DFAE0 00000BCE
04100000 AC4DFAE8 00000BD3
04100000 AC4DFAF0 00000ECC
04100000 AC4DFAF8 00000ED0
04100000 AC4DFB00 00000ED4
04100000 AC4DFB08 00000ED8
04100000 AC4DFB10 000030BE
04100000 AC4DFB18 000030C2
04100000 AC4DFB20 000030C9
04100000 AC4DFB28 000030CC
04100000 AC4DF9D8 00000AEF
04100000 AC4DF9E0 00000AF5
04100000 AC4DF9E8 00000AFF
04100000 AC4DF9F0 00000D2F
04100000 AC4DF9F8 00000D2A
04100000 AC4DFA00 00000D20
04100000 AC4DFA08 00000D25
04100000 AC4DFA10 00000D35
04100000 AC4DFA18 00000AFA
04100000 AC4DFA20 0000114A
The Inventory Code generator on Cheatslips will have the feature to change the Player too.