Loading custom onCreate?

[bdbssb]

I’m trying to make a custom slideDoorTrigger lua. I need to register it in the i3d. I understand how to do a callback onCreate, however how do I source the new lua?  If I simply try to source it via the modDesc I think it just loads the lua but it’s not calling it when needed at the trigger. I know the original script still works because it’s used at the vehicle shop.