I was trolling on google and saw se7ensins so I went to it and I read on and someone said if you clear your cash and open your profile on your usb then put this in for your clantag, you will have mods in split screen.
bind BUTTON_BACK "player_sustainammo 1;noclip".set Perk_weaprateMultiplier 0.001.bind dpad_left "toggle timescale 0.5 1.0".bind dpad_right "fast_restart.
I was thinking if this does work, do you think you could get infectables like, super jump or something and go to system link, join another retail then update the first retail, join back to the system link and get the mods or does it not work like that? Im not even sure if it could be possible to mod mw2 like this anyway with the clantag but if you want to try or see where I got my info go here : Type Se7ensins before it all sorry.

.com/forums/threads/mw2-cod4-noclip-godmode-mod-tutorial-no-scam.193986/