How Do I..

Take Out Mobs In A Curtain Mob And Replace Them With The Mobs I Want I Would Appreciate Help Thanks Very Much:D.

get a cvc editor and edit the list.

Very easy PrestonWolf,
just go to share/map open the map that you would like to change the mobs in/ for example share/map 46: "mon_46_aquirai_ruins.csv" open it with excel and in column "A" is the monster # column "B" is time until spawn column "C and D" is X Y location.
all you have to do is open share/creature/monster and find the monster that you want to spawn ^_^ all done