I have a VPS I use to host a few simples web pages. Since this server is almost without use, I wanted to try airtime. Is it any problem if I install Airtime in this server? I'm worry because I don't know if the airtime installation script would change some features of my current configuration and my web pages would be unaccesible.
You should not do that. Airtime installation script is going to modify Apache config and eventually desable your web site. If you don't really understand what is done, don't go further.