WordPress MU

pls can someone explain how to do this, thanks.

http://mu.wordpress.org/forums/topic.php?id=5000&page&replies=13

If you want to change the location of the themes directory you can use a filter, in your case you can change the if statement to match the blog_id you want to restrict.

eg.

add_filter('theme_root', 'rgo_group_blog_theme');

function rgo_group_blog_theme($thedir) {
if ( is_group_blog() ) {
return ABSPATH . "wp-content/mu-plugins/group_themes";
} else {
return $thedir;
}
}

No, no no. You are making it too complicated.

http://wpmututorials.com/themes/enabling-a-theme-for-just-one-blog/

OMG! Make this feature more visible! I've searched too long for it!
BTW tnx!!! (also if this replay come 9 months after the last one!)