I accomplished this by editing the mob_load (mob.c) and itemdb_read (itemdb.c) functions. They were simple edits, but they needed to remove some lines of code. My question is how can I pass this on to a plugin? Is it possible to make this type of change through plugins?
although I still recommend using hooking instead of overloading as much as possible,
as having 2 plugins overloading the same function might cause problems for your server