Mount LVM partitions on a different system

Today i faced a situation where i had to mount LVM on a harddisk that didn’t belong to my system. So what is i did is this:
apt-get install lvm2 dmsetup mdadm reiserfsprogs xfsprogs
(some packages such as xfs and reiserfs are for my own need, you need lvm2 basically)
and then followed this tutorial to mount the partitions and backup data.