I've followed the vbgallery instructions included in the download. Two things, editing one of the templates says to find
'aaa' => 'AAA Old Backup'
in /forum/includes/adminfunctions_template.php file
this string does not exist in my file.
More importantly when trying to run the install script forum/admincp/vbagallery_install.php I get a 404 not found error even though the file is there in the directory. Bit confused by that.