I had been planning to implement something similar to this...with a 'twist'. Namely, I plan to do one which accepts multiple rexexp / replacement value pairs, allowing each page to specify it's use of the 'include'. This is mainly so I can share includes between ASP and ASP.NET, allowing me to replace the <%=Content%>ASP tags with content supplied by the ASP.NET page..get round to it some time :-)