Hello Mbriao, are you asking how to make ANY page visible (HTM, HTML, PHP, etc) or just PHP pages? If nobody can connect to your website, change the company firewall to allow incoming TCP traffic, port 80, to reach apache.exe. And allow outgoing TCP ANY from apache.exe.
Please remember, WAMP is not a production server. Hosting a website will invite many hackers to try cracking your company intranet. Many businesses get "hacked" this way every year - it happened to me once at a tiny engineering business! Someone at your company should be a professional website administrator who can setup and maintain this server properly. If not, you are taking a BIG risk.