go into the extracted rez, get the dtx files for the sniper scope, rename them to match the red dot scope names
get the .spr file for the sniper scope and rename it to match the one for the red dot scope.
inject, rename, play.
all you need to do is buy a gun and buy the standard, red dot scope (the one that displays damage and ammo, or the one that displays distance) mount em, and it should work.