Openvz vzctl snapshot and restore on ploop help

In short:
I want to know how to restore backup taken using "vzctl snapshot" ?

In detail :
In an openvz server, which now I look after, backups are taken of VMs using :

vzdump --compress --dumpdir /mnt/backup --suspend -all

However, it puts down each container for around 10 mins .

I can't take vzdump snapshot using LVM (thus avoiding downtime) as this machine has no free LVM space.

But now with ploop, vzctl allows to take snapshot without using LVM , so if I follow this guide ..
Which has following script:

#Known snapshot ID
CTID=$1
ID=$(uuidgen)
VE_PRIVATE=$(vzlist -H -o private $CTID)
DESTINATION=$2

 # Take a snapshot without suspending a CT and saving its config
 vzctl snapshot $CTID --id $ID --skip-suspend --skip-config

# Perform a backup using your favorite backup tool
# (cp is just an example)
cp $VE_PRIVATE/root.hdd/* $DESTINATION

# Delete (merge) the snapshot
vzctl snapshot-delete $CTID --id $ID

So its taking ploop snapshop, copying file to backup location and then remove snapshot (merge).

Ok.. thats the backup..but how do I restore this kind of backup ?.....

Because I see following files in backup folder :

DiskDescriptor.xml
DiskDescriptor.xml.lck
root.hdd
root.hdd.{bc277312-585e-4b68-bb1f-7c91d1d7737e}