Can somebody give me a quick run down on how to add PAP guns from normal ported weapons.

just another copy of the weapon, using different stats, and with a different model

the model is usually even identical, just with "some" of the textures changed to the pap texture

Ok the key is converting a model again with different textures? Then adding it to an upgraded weapon file.

Ok the key is converting a model again with different textures? Then adding it to an upgraded weapon file.

yes

can even just copy your xmodel ( raw/xmodels/ ), open the new one in a text editor, and go manually change the material name, to the new material

Immediately after you will be able to see it in asset viewer

Then copy your weaponfile, change the model, to the new model name

done, still need to change the ammo, damage, name etc in the weaponfile, but at this stage, you can get and use the gun in game

( remember to add :

xmodel,NEWMODELNAME
weapon,sp/NEWWEAPONNAME

to mod.csv )

yes

can even just copy your xmodel ( raw/xmodels/ ), open the new one in a text editor, and go manually change the material name, to the new material

Immediately after you will be able to see it in asset viewer

Then copy your weaponfile, change the model, to the new model name

done, still need to change the ammo, damage, name etc in the weaponfile, but at this stage, you can get and use the gun in game

( remember to add :

xmodel,NEWMODELNAME
weapon,sp/NEWWEAPONNAME

to mod.csv )

You don't need to add xmodel into CSV if you're already putting the weapon in.

I have my upgraded gun with custom camo and stats and others. But when I pap the machine gives me nothing. What am I missing in the scripts?

all i can guess is :

weaponfile name needs to end with "_upgraded"

need to add to mod.csv

weapon,sp/zombie_colt_upgraded

and add the images for the pap camo to your mod folder