Instead not, the helicopter is used in this mod; you don't remember neither what you're doing in it, Anthony.
![Razz :P](./images/smilies/icon_razz.gif)
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.