Ginny's suggestion allows you to access HTML files sitting in the Web Server; if your Reporting Server is running in the same box chances are both services are "seeing" the same files as APPROOT may be pointing to the exact physical location.
However, if the Reporting Server (EDASERVE) is running in a different box to that where the Web Server is, you'll probably need to do something like the following in order to access HTML files sitting in that box: