I have seen the same code behave differently at work than at home. At work we had the API/CGI version of PHP installed and now the ISAPI has been implemented. The old script no longer works but for a new project we need ISAPI (PDF functions) and now in order for me to do development at home I want to run both. I have IIS 5 with PHP API/CGI running now, I would like to have APACHE with PHP ISAPI for extensions having .php3. That said, does anyone know how to run API/CGI & ISAPI on the same box with different ports and extensions? Thanks in advance!