Hey guys,
I made a full dutch Siren mastery, used Albo1125 his base mod, and Ginot1994 his sirens, and created a full Dutch Siren mastery including the well known HONAC Sirencontrol box.
This mod is fully working!

For great dutch unit mods, check out MOHaalsmeer ( https://www.gta5-hub.com/users/mohaalsmeer )
He makes some great mods for the dutch community!
Also for scripts, Albo1125 has some great scripts, all working properly!

Requirements - some of these are included (credits go to their appropriate authors):

Albo1125.Common 6.1.0.0 or higher (included)
RAGEPluginHook 0.44 or higher (not included)
A legal copy of GTA V (version 1.0.791.2).

Credits

Albo1125
Delco24 - Controller Unbinding meta edits
NAudio developers.
World MC Marco - All the default UI images and getting the UI images set up properly.
TaylorSwift - Siren Switch and Siren Toggle tones.
OfficerSquare & purplepotatoes14 - Thumbnail
ginot1994 - Sirens (Motor siren by World MC Marco)
Loyalty Rewards Programme participants.