running ASP and PHP together

I'm working on an assignment where it's my task to convert an ASP/Access webpage to PHP/MySQL. There's a remote server which is used by clients and there's a server inside the company which is used by the employees to maintain everything and possibly test things.

For now they will keep using the ASP web-application. In the meantime I am working on the PHP web-application, which is a conversion with a number of improvements.

So what is the situation? I need to run PHP on the same server as ASP. Is this possible? I suppose it's done by means of ports. Accessing the same URL, but with a different port or so?

Normally I'd quickly install IIS on my own box and use that for PHP development, but some employees wish to test the developed page in between from a remote location. That's why the preference is for it all to run on that one particular server in the company.

Anybody got a suggestion? Thanks

I'm confused. If you have an IIS server with PHP installed, the page extension determines which interpreter is used. You can certainly have both asp and php pages served up by the same web server, I use my local IIS for both, and my ISP runs on Windows servers but provides php/mysql too.

Argh~~, my mistake. I mixed things up as I was also looking at Apache running besides IIS, but few hours after my post I realized that it can easily be done with IIS alone.