You should investigate the URL rewrite features available to your web server (IIS or Apache). The ColdFusion server is not the ideal place to URL re-writing since, in a default installation, it does not handle requests that are not associated with a ColdFusion file type (*.cfm, .*.cfc, etc.).
If you are using IIS 7, you might try the Url Rewrite Module from Microsoft
If you are using Apache, you mighty try using mod_rewrite