As a result of my last blogs [1], if you want to use a different file extension for the Ajax.NET Professional [2] JavaScript wrappers you can simply use ASPX or any other file extension. You only have to change your web.config file and tell the Ajax.NET Professional library to use that extension. I put an example project [3] in the Google group [4] that will use the ASPX file extension that is enabled by default for ASP.NET web applications.