How do I set the vehiclescript for an entity?

So I made an entity that is basically going to be a car without gravity, but I have no clue how to add the vehiclescript to it, I have searched everywhere but cant find anything. Here is the SpawnFunction for it.


function ENT:SpawnFunction(ply, tr)
   	if (!tr.Hit) then
	return end
 	 
 	local SpawnPos = tr.HitPos + tr.HitNormal

 	local ent = ents.Create("prop_vehicle_jeep")
	ent:SetPos(SpawnPos)
	ent:SetModel("models/buggy.mdl")
	ent:Spawn()
	ent:GetPhysicsObject():EnableGravity( false )
	ent:Activate()
 	 	 
	return ent 
end

Try this:


ent:SetKeyValue( "vehiclescript", "scripts/vehicles/jeep_test.txt" )