Hi blusky75,
concerning the SunExpress DLR I know that they originally only did the DLR GU (1 day), simulator screening and an interview with two DLR psychologists on another day.
Rumours amongst SunExpress pilots tell that they now switch to the full DLR process like LH Italia does it.
But that wouldn't mean 5 days of testing?
You can do the DLR process numerous times, but only once with one airline.
Hope that helps, Cheers!