Instead not, the helicopter is used in this mod; you don't remember neither what you're doing in it, Anthony.
In this Invert Mod v2 the helicopter is used both as player car and also as cop mod, but your cop mod doesn't work well: it doesn't replace all the default cop cars both in SF and London and the helicopter is only a white shadow.
To solve this problem just replace the "vpcop" internal car basename with "heli" in all the roam.aimap and roam.aimap_p files. About the white shadow problem, it's just given by the lack of the helicopter textures. More, should be something wrong in its .pkg file.