As similarities between weapons from world war 2 and nowadays ones are very close, it is quite easy to replace originals weapons by the new ones I want to add.
So I will gradually replace weapons from the original game with those I want to use with Wolfzone mod.
Thompson to M4 carbine:
The Thompson submachine gun used during world war 2 use 11.43x23mm (.45 ACP) cartridges with a rate of fire from 600 to 700 RPM and a 30 rounds magazine.
The Colt M4 carbine and derivatives use 5.56x45mm NATO (.223) cartridges with a rate of fire from 700 to 950 RPM and a 30 rounds magazine.
So except for the caliber and the rate of fire, similarities into the game between these weapons are close enough to re-use almost all settings as is so I just increased the rate of fire and replaced Thompson animations with the M4 one I have made.
MP40 to AK-47:
The Maschinenpistole 40 used during world war 2 use 9x19mm Parabellum cartidges derived from 7.65×21mm which itself was derived from the original 7.65×25mm Borchardt cartridges, with a rate of fire from 500 to 550 RPM and a 32 rounds magazine.
The Avtomat Kalashnikova model 47 well knows as AK-47 use 7.62×39mm cartridges with a rate of fire of 600 RPM and a 30 rounds magazine.
This time too, similarities into the game are also close enough to re-use all settings with just few changes and replacing animations with those I have made.