Adding seasonal items to offline game

[JoReaper]

Hello. Is it possible to make seasonal items drop during the game via the editor?
I found this code. Will it work in the editor? If so, how do I apply it?

[Allow seasonal items offline]
04000000 0048B510 14000005
04000000 0088E608 52800020
04000000 0088E60C 1400001A

I don't want to just add them to my inventory. I want them to just drop, with normal gameplay.