I asking, bcuz some players may ignore the required item, that need to be downloaded

You could *technically* integrate it into your own mod, and follow the steps I've outlined in the description to prevent this mod from overriding it if present. You'd need to make sure it would only override your mod's act select menu though, otherwise it'd override other mods' menus too.

Why do you ask anyway, is it because there's currently no real way to ensure players actually download required items?

Can this fix be integrated into the mod i doing?
Or it MUST stay as required item?

ITS ACTUALLY THE BEST MOD EVER