I currently have PhotoPost installed on my vBulletin site but I am now thinking of moving my forum over to Xenforo. So the thing is what do I need to do to retain all my current galleries I now have installed and populated?
Yes you would do as instructed. You disregard any duplicate mysql errors you get on reinstall as you are simply reinstalling to update everything to integrate with a different product. If you answer everything correctly then you will be integrated with xenforo and see something like this