I did it twice today and a week ago.
I install fresh Kloxo-MR7, after that I switch programm to nginx, and after restart nginx doesn't start with error
"Starting nginx: nginx: [emerg] open() "/opt/configs/nginx/conf/globals/listen_ssl_default.conf" failed (2: No such file or directory) in /opt/configs/nginx/conf/defaults/init.conf:43"
I took thesee two files from another my old VPS and copy them there, and service started well.
Also I tried nginxs+httpd and there was the same error.
I hope this information will be helpful.
I don't Know why but at 6 o'clock everyday php-fpm stops and needs hand restarting.