installing SQL 5 on server with other apps

I have a win 03 server with other apps that use SQL , and I have a web app that we are going to run on anothyer server. For security reasons we don't want to run SQL on thee same server with the webpage. So, I intent to install SQL on a separate drive on our domain server that the web page will point to. I was wondering if installing a fresh instance of SQL on a machine that already has other apps that use SQL will interfere with the other apps.

thanks