Yes, but in a specific way...
There are many possibilities, but the idea I have is that you create your addon in O2, and then you give it the properties of some kind of vehicle that does not move.
You can animate movment of your addons, and I am sure if you attatch a light to it, it will work exactly like a searchlight.
The GTA mod has a prison inside of it, so hope for a searchlight to be released soon, maybey.