Plutonium

i wanna play mw3 private match with my brother but i have no idea how to, any ideas or help?

is there such thing as a mod like this? i pray there is because i'd love to use my fav games guns on bo1 or bo2

the title

is there such thing as a mod like this? i pray there is because i'd love to use my fav games guns on bo1 or bo2

how do i go about using a mod menu just with some friends without getting banned?