I believe this should work...
In gallery/index.php find
Code: Select all
$user->setup(array('mods/gallery', 'mods/info_acp_gallery'));
and replace with
Code: Select all
$user->setup(array('mods/gallery', 'mods/info_acp_gallery'), '1');
Make sure you change the 1 to the style_id you want.
You probably need to do the same in all the main php files in the gallery folder.