Hi All,

My Windows 2003 Server already has MOSS 2007 installed on it. I would like to know if DNN can coexist with MOSS? If so, do I install DNN as virtual directory under Default Web Site? Or, is there a different approach? I tried creating the virtual directory under Default Web Site. However, when I browse to localhost/DNN I receive a HTTP 404 error. Please also note that I need to install DNN 4.9.1. Thanks much for your help and guidance.

-Sid

It's probably best to run DNN in an IIS website apart from MOSS because some HTTP handlers that are used by MOSS might get in your way. 
I have a similar setup on my server: I run DNN on my Default Web Site on port 81, MOSS runs on a separate website on port 80.
Following this approach ensures that DNN is completely isolated from MOSS. You might want to avoid unexpected behaviour in either one of them.

Greets,
Nils