How to edit Item Mob ProTo Help

Hello epvp.
I whant to ask u how I can edit mob and item proto ?
I know that somebody have got creative this kind of program but i can not find it ;;/
(This themaa)
Can somebody give mi link fore this program?

Clientside?

Yes please

You can´t edit the latest version of the mob_proto.
But the item_proto you can extract and pack with Eddy² FileExtractor.

Ok thx.
I have got old one.
from 2011