A dump from 1 site to another is very simple.
- the PATH to the forum must be updated. (/gallery/gallery_config.php)
AdminCP => vBGallery => Modify Settings
- Title, URL's, & Paths
-- Files Path ( also chmod -R 0777)
-- FTP User Folder Path (also chmod -R 0777)
The backup and restore may have also changed ownership of the files/folders you un-TAR from your old web user to "root" (99). You may have to claim ownership of files and folders.