hdp cluster define disk partition using ambari

hi all,

when installing hdp cluster , i tried to use the best practice from hortonworks for how to define the disk partition
using the following procedure: http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.1.2/bk_cluster-planning-guide/content/file_system.html
i am using ambari 2.0 for installing my stack
the hadoop defualt installtion path is /hadoop/xxx
is there a way to tell ambari to use the best practice from the link above instead /hadoop
if not what is the best way to it manually

tanks in advanced
shlomi