Topic/forum does not exist adn index.php redirect

[The_Wizard]

How can i redirect "The requested topic does not exist.", "The forum you selected does not exist." and index.php to www.mysite.xxx without zero dup and others mods.

edit:
or it is better to redirect "topic/forum does not exist" and www.mysite.xxx to www.mysite.xxx/index.php?

thx

[The_Wizard]

i already have in .htaccess

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RewriteEngine on
RewriteCond %{HTTP_HOST} ^mysite\.xxx$ [NC]
RewriteRule ^(.*) http://www.mysite.xxx/$1 [QSA,L,R=301]

sry for double post.
i ve pressed quote instead of edit...

[dcz]

For the redirect, you can add them right before :

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trigger_error('NO_TOPIC');

in viewtopic.php and :

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trigger_error('NO_FORUM');

in viewforum.php.

To redirect index.php to domain's root, you can add something like :

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// www.phpBB-SEO.com SEO TOOLKIT BEGIN
$uri = $_SERVER['REQUEST_URI'];
If (empty($_GET)  && strpos($uri, "index.$phpEx")) {
      header("Status: 301 Moved Permanently", FALSE, 301);
      header("Location: http://www.example.com/phpBB/");
      exit();
}
// www.phpBB-SEO.com SEO TOOLKIT END

in the beginning of index.php and with the proper url for your domain

++

[The_Wizard]

what to add before

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trigger_error('NO_TOPIC');

and

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trigger_error('NO_FORUM');