I was kind of lost with DA42, but it doesnt have pitch/mix so can you tell me whats the engine out procedure.
The engines are controlled from master switches on the ECUs - the engine out procedure is simply to turn the engine master off. Above 1300rpm the props will feather as a result. It's a misconception to say that they've got autofeather, since there is an action required from the pilot to initiate feathering.
About using DA42 for the 8 hours in CPL training and MEP rating, how many of theese towards the CPL and how many towards the MEP rating.
The 8 hours count towards both, which is why there are 2 extra hours over the basic requirements for the MEP rating. Your CPL test would also include the required items from the MEP test.