dual web server question 2

Hello, I am real new at server config as you will soon see................need 2 questions answered. Part 1 I want to install php on a Windows NT machine that is currently using Domino as it's webserver. If I use the php 4.05 auto-installer, it says that IIS will be automatically configured. Which is good cause I am going to need to use it. However, I am trying to understand what port IIS will be assigned to use since Domino already uses 8080. Or is this something I have to set manually. The thing is I can't upset the current configuration just yet. Will installing php this way mess up my current set up? Part 2 As someone pointed out to me yesterday I can have more than one web server running on one machine at the same time. I just have to figure out how all that works. Can anyone point me in the direction of some good information to learn about how to handle these issues. Thank You Kindly, Deb