[REQUEST]LOFT Class editing! IN CLIENT/SOURCE

Can anyone tell me or give me a guide on how to:

Add/Edit classes in source/client?

go to proffessinalnames in your client ( ini folder )

add new ones im guessing like

250 Chicken,
251 Duck,
252 Lobster,

and if you do /job 250 it will say chicken lol then add in your source like reborn have its skills lol