Rewrite 2 different directories with htaccess?

view story

http://serverfault.com – I have a tricky problem (for me at least). I'm trying to rewrite / to a folder /webroot/www. I have some simple code and it works: RewriteRule ^$ /webroot/www/ [L] However at the same time if the URL starts with components, followed by anything else (ex. foo, as in /components/foo), and foo is an actual directory that exists inside components, I should rewrite to /components/foo/www instead. How can I achieve that? I can't seem to figure it out. I'm using Apache with .htaccess. (HowTos)