well you cant really transfer vbgallery to a new server without vbulletin because as its a vb
addon your tied to the forum your running the gallery with all that forums info is relevant to that install. You can not integrate with a separate vb
You can delete the vbgallery from the old site start fresh and install it on another brand new forum thats not an issue but I assume your trying to keep all info which means you need to move vb
and vbgalllery over to any new domain.