FallBackResource is a great alternative to using mod_rewrite to direct Apache to send all requests for non-existing files/directories to a script in WordPress. Htaccess and Server Config enabled.
htaccess rewrite / Mod_Rewrite Tips and Tricks is as glamorous as it sounds! htaccess rewrite mod_rewrite is just possibly one of the most useful Apache modules and features. The ability to rewrite requests internally as well as externally is extremely powerful.