> index.cfm?page=details&id=99 
> instead of 
> index0623e.html?page=details&id=99  ?> 
> so basically i want to keep the file extension name.

No you don't. You can not get server side code (cgi, jsp, cfm, sql, etc) from
the public side of a web server, just the html output and related files.

If you rename the files to .cfm, you won't have cfm files only html and
Windows won't know how to open them if you click on one.

If you insist, add mimetype cfm -> text/html and the 3.4x version will output
cfm extentions