Yes, they are mat poses.
I don't need to convert them from P4 to P5, they are already P5.Just wanted to be sure if they can be used by someone using P4.But from your explanation I draw the conclusion, they canot be used.
Thank you for your help!

PS : I have the mpe, but I have never used it.I feel much more confortable making my mats by hand.It's more secure.But I will have a look through the tutorials, maybe I will change my mind...