Web.config Access to other Sub Folders

hello, I am running a Windows Server 2003 Standard machine, with IIS7 Hosting my website, NopCommerce is in the root directory, so when you go to http://domain.com it will take you too the index nopcommerce store, however i wish to host my Webmail on the same server so apon creation of a new Virtual Directory, when i open that directort say http://domain.com/mail it gives me an error about duplicate entries in web.config in the root directory, Just wondering if there was away to have two web.config files in seperate folders for seperate applications, Sorry im new to this.

Thanks alot

Ethan

This thread can be closed now, Problem fixed, Just Created new subdomains rather than sub directories.