Access based on IP Address

I would like to combine <cfif> and <cfinclude> to control part of the content of a page based on IP address ranges. Basically, when a user accesses the page from a defined range of IP addresses, the <cfinclude> calls foo.cfm into the page. If the user accesses the page from an IP address outside of the defined IP address range, <cfinclude> will return other_foo.cfm.

Any suggestions for a newbie?

Thanks in advance.