The server just needs to have includes turned on.. the WDN has some documentation on how to turn on mod_include for apache.
http://www1.unl.edu/wdn/wiki/Enabling_mod_include
You'll just need to open the httpd.conf file, find the few lines which load the module, tell the server to parse .shtml files, and enable it in the options for the root directory.
Here's the official Apache 2 docs on mod_include --- http://httpd.apache.org/docs/2.0/mod/mod_include.html

