PROCESSOR-SDK-AM335X: power & DDR3 issue

Part Number: PROCESSOR-SDK-AM335X

Question 1 : 

PMIC of Starter Kit  " TMDSSK3358 "   is use TPS65910 ,  but i will change to TPS65217 . the change  is OK ?  Is there any need to pay attention? 

Question 2 :

PMIC of Starter Kit  " TMDSSK3358 "   is use MT41J128M16JT-125  ,  but i will change to EM6HE16EWAKG . the change  is OK ? Is there any need to pay attention?

Question 3 :  

PMIC of Starter Kit  " TMDSSK3358 "   is use TPS65910  ,  the power on need press button .  if  power is on how to modify hardware design or software ( not press power button on TMDSSK3358) ?

thanks'