Example docker-machine vSphere create

docker_host_vsphere.sh

#!/bin/bash
# Example docker-machine vSphere create

export VSPHERE_CPU_COUNT=4
export VSPHERE_MEMORY_SIZE=8192
export VSPHERE_DISK_SIZE=100000
export VSPHERE_VCENTER="vcenter.doamin.com"
export VSPHERE_USERNAME="DOAMIN\user"
export VSPHERE_PASSWORD=""
export VSPHERE_NETWORK="VM Traffic"
export VSPHERE_DATASTORE="datastore_name"
export VSPHERE_DATACENTER="datacenter_name"
export VSPHERE_POOL="/datacenter_name/host/host_name/Resources/pool_name"
export VSPHERE_COMPUTE_IP=""

docker-machine create -d vmwarevsphere docker-vsphere

Can VSPHERE_POOL be left blank? How do you get the boot2docker iso file into the datastore?