You need to do two things. 1. Add the weapon names to the meleeweapons list in your mission file. 2) Load the custom weapon controller vscript, and add the weapons to it. Look at my mod "Diescaper Source Files", it has everything working.

Not the method I use at least.

i see because I was wondering if there would be a way to add the weapons from the japan version of the game

Yeah, that doesn't sound possible to do properly without modifying the game. My custom weapons are essentially melee weapons with extra functionality added with scripts.

ya ive been looking around the files and scripts to see if it would be possible

I was able to add through your method but they will always be secondary's

Get this and any of the weapons above. They will spawn in any local games on the official campaigns. If it doesn't work, try removing any other mods.

The only reason I can think of why it wouldn't work is a conflict with another mod.Try disabling any other script mods.

Nevermind Rectus, I found the problem actually. this addon, vpk itself. It only loads on official campaigns only because the script will load those maps in the mission file but in that vpk file only. But I managed to found a way to load the script so I can able to play on other maps.

Yeah, that would be it. Unfortunately there is really no way of making it work for other campaigns than modifying the individuals campaign files.