Adding the .phtml file extension to the thttpd SAPI?

The PHP's thttpd SAPI only supports the .php extension but various PHP based, third party apps require the .phtml extension. BTW, recoding the third party apps to use .php is not a viable option. The job would have to be redone each time an updated version is rolled out :-) Personally, I don't know how to add the .phtml extensions (perhaps .phps would also be useful for some users). I'm hoping that other thttpd users also have the same requirement and that a generous programmer will add the additional extensions into the thttpd SAPI. Does anyone have reason to believe that this will happen soon? :) FYI, It's a small footprint linux install on old low spec hardware that I'm working on and thttpd would otherwise fit the bill nicely.