I know the following is impossible, but there should be a workaround.
As I'm now having problems with my very-clickable application,
(visits) (page views) (hits) (data)
(~100 000 php page views every day) I decided to try HipHop-PHP, an opensource application from Facebook.
It should be able to transfer my application to c++ code and compile it. It should act as a webserver, like apache. The biggest problem is that I do not need/want a compiled application on the other websites. Why is it a problem? It runs on port 80, as my apache2 does and it is just not possible.
Is there a way to run 2 webservers on one virtual server?