Then you did not complete the mod as instructed.
The admin section for one in the instructions says to place a link to your default stylesheet in adm-inc.php
As far as the templates. There are two versions 4.1 and 4.5
I relooked at the directions and they are fine. There was one line that was not different in 4.5 The place to place main-inc.php call but not so different no one could figure it out or for that matter it would matter.
require "config-inc.php";
if ( !isset($PP_PATH) || empty($PP_PATH) ) $PP_PATH = ".";
if ( !isset($pplang) || empty($pplang) ) $pplang = "english";
require "$PP_PATH/languages/$pplang/pp-inc.php";
If you say your layout is destroyed using the templates then I would say you have not set the paths to your tbopen tbclose variables example below
Also directions also tell you to set them in feature.tmpl also
/// Require the library. Edit the path to the
// main.inc.php file if necessary.
require ("/usr/local/apache/htdocs/ubbthreads/main.inc.php");
require ("/usr/local/apache/htdocs/ubbthreads/templates/default/tbopen-default.tmpl");
require ("/usr/local/apache/htdocs/ubbthreads/templates/default/tbclose-default.tmpl");
Refollow the directions as nothing has changed except that one line I pointed out and if you do you will have something like this when done
http://www.reeftalk.com/gallery/index.php http://www.socaps.com/photopost/index.php http://www.stormchat.com/photo/index.php http://www.ultimatenurse.com/gallery/index.php Those are a few off the top of my head.