HOWTO: rewrite requests for images, css and js to different folders for each application?

[eluser]picardo[/eluser]
I put each app on a different domain. They are sharing the same system folder. So the htaccess file checks for the domain request is coming from, and if it's a request for an asset, it redirects it to the assets folder of that app. They're on the same server. One thing I realized is that it needs tweaking to exclude user_guide, but that's not that important.