One problem is the .xml is slighty different but i went ahead and modified it regardless to similiar instructions, now it said google play services stopped, youtube has stopped, es file explorer cant stream. All because I added <group gid=”media_rw” /> and changing it back didnt work either so now I'm restoring and hopefully trying this again. God, this is REALLY annoying to fix a problem that shouldnt even exist.
Edit: Ok, I restored from backup and had to remove <group gid"sdcard_r" /> THAN add the other one. It sseeeeemms to work.