I work in a dev environment that is currently IIS6/Server 2003 with Framework 3.5. I primarily am working in ASP.NET MVC.
I've run into a scenario where, for the solution I'm working on, I'd either have to spend weeks reinventing the wheel or integrating a PHP-based opensource project into one of the components I'm building.
I'd love to add this project to the fold, but the fact that it is based on PHP greatly concerns because of potential compatibility, security, and administration issues with running both PHP and .NET on a single IIS installation.
What are your experiences of doing this? Good? Bad? Not a big deal? Major headache?