Loading a new PED/CAR , and adding the ID I want

[DanHR]

I haven't tested it as I dont have a model available right now, but would it be possible to load a ped or a car with engineRequestModel, get the ID with getElementID, then replace it to whatever with engineSetModelTXDID?
For example, let's say we wanted to add Tommy Vercetti to the game, and assign him ID 313 (I think that's the first free ID), would it be possible to create a tommy element, get its id, then change it to 313? (and ofc destroy the element afterwards)

If this is possible, how cars and peds created this way can have sounds? Can I somehow load ped voices from vice city so we can have the "official teta inspector" line in game?