Battlefield Modding Tutorials BFMODS

Hi so I'm trying to make a new multiplayer game mode called infiltration for a CSM mod I'm making. Basically, its the same as CTF, only theres only one flag or object to be retrieved by a team (in this case a briefcase). That same team must steal the briefcase containing top secret documents from the other team while that team must prevent them from escaping with the briefcase at the extraction point (which could be a CTF base with another geometry, like a helipad). Any thoughts or hints on how this could be done?

single-flag CTF has tried to be done before...unfortunately I don't think its possible with simple coding.