http://www.setupgrid.net/1/setup/endu there's one for the fxo, but i don't see one there for the rb4, but there is one for rb4-ky3, it might be close enough.
Quote from zeugnimod :30 laps without tyre change? Good luck, you will need it. i dont`s say without tyre change. With hotlap`s setup it`s very hard to drive 3-5 laps.